SAT Questions

Ok here’s the deal, i have my laptop and xbox 360 which is on one side of the room (this is quite a long room, not sure how long but i dont feel like measuring) and i have the desktop computer in the other end of the room which is connected to a wireless router. What i want to do is connect my Xbox to my laptop and then using my laptop connect to the internet, just in case ill put a little diagram:
XBOX 360 <ETHERNET CABLE> LAPTOP <WIRELESS> DESKTOP/ROUTER <INTERNET>

Now ive been google-ing around and have found many people asking the same thing and others sharing their success in connecting and saving the money instead of buying a wireless connection for xbox, i have tried a few of these methods and none have yet worked, i have tried: making a bridge connection between my wireless and xbox cable and that didnt work and just plain connecting the xbox to my laptop and wirelessly connecting. i have tried both multiple times and nothing seems to work and aside from this topic sometimes my laptop doesnt recognize the xbox and when i do xbox-laptop connection test it fails. sorry for the long question but i really wanted to express in detail.