Can my cat help find my other cat who went missing yesterday?

No, and you are likely to end up with two missing cats that way. Have you called all the local shelters looking for him? Shelters generally only hold strays for 3-5 days, after which they are either euthanized or offered for adoption. Have you gone door to door in your neighborhood? Looked under shrubs, decks, etc? Looked on the side of the roads for his body? You need to be actively looking for him.

HOW DID IT GET OUT??

No. YOU need to get out and look for the cat.

Probably not.

While cats do have sensative smell, a cat is unlikely to actually attempt to track down anything. Try attracting the missing cat with your smell or your other cats smell, and they may find their way home.