Worst route: Get an XLR to 1/4" cable, and a mono 1/4" to 1/8" adapter. Now plug the mic into the cable, into the adapter and finally your MIC IN on your soundcard.
Better route: Get an XLR to XLR cable and a simple preamp such as the Audiobuddy. Plug the xLR to XLR cable into the mic, and then...