any program out there can blow this up for printing as a 24' x 36' with minimal loss of quality
you won't lose quality resizing it larger anyways, you just won't gain any quality whatsoever, and no program can add quality (IE get something for nothing). The only thing you can do is increase the size by decreasing the dpi
perhaps:vectormagic (online only)photoshop, image resizing by %10 till reaching desired sizerasterbatorYou may not get the desired results with any of these.
24 x 36 feet?