Not enough info for a clear-cut reply. However, I can clearly see you being an ass toward another member who was just trying to help by asking you some very basic questions about the hand.
Still, I'll reply because this hand doesn't just pertain you, but many other players who might be in this situation one day.
1. Blinds in relation to stack sizes are very important. How 'deep' you are is very important. Playing AK when the effective stacks 10BBs deep is much different than if you are 100BBs deep. It also depends on what type of 45-man SNG it is. Is it a regular or a turbo?
2. Seeing as it is a 45-man SNG final table, I can suspect stacks are pretty shallow, but who knows? Maybe the SNG just flew by and you're only on blind level 5? I highly doubt that and in a reply you said stacks couldn't be more than 15BBs. If you're talking about your stack, then you aren't deep at all. Blinds are ~1K/2K
3. So, we can safely assume that your stack is at 30K, with blinds at 1K/2K or 15BBs deep.
With a stack this 'deep' getting your money in PF with AK is perfectly fine against a nitty villian. If he shows up with AA or KK here, good for him, but we'll take a flip against his other hands-1010+, AKs. His reraise preflop did look a bit suspect only being 15BBs deep. Most, especially if they're trying to take a stand against an aggressive preflop player, would shove there to put the aggressive player to a decision. Just raising looked strong and he didn't want to scare you off the hand, IMO. Or maybe he's just bad and was ready to fold if a J,Q,K,A hit the flop? I don't know...