My iphone 5 was stolen today had it backed up last week can restart this back up on my other phone which phone4 how can as when plugged my iphone 4 it backed up automatically

My iphone 5 was stolen today, I had it backed up last week, can I restart this back up on my other i phone which is i phone4? how can I do that because when I plugged my iphone 4 to my laptop it backed up automatically and I can't seem to find the older back up or maybe I don't know where to find it?