What is the resolution size of the picture? It should be 300 DPI minimum, to blow up a picture to that size. The camera quality doesn't necessarily matter. The cameras generally take 4x6 sized pictures. So, you're trying to blow it up 8 times. If the resolution size is below 300 DPI, then it's not going to work. The picture quality might be high, but it's probably only high in smaller sizes. You have to have a mighty powerful camera and photography ability, to take a small picture quality enough to blow up that large. (I did not mean that to be rude, just trying to say it's very difficult to blow up pictures to that size!!)
If you have the original file (ON the camera, not the computer. It has to be the RAW image, from the camera.), if you can get the size to 18 x 24, and 300 DPI...you might get a decent print. I don't think you would be able to size up any larger then that, at a good quality.