[fliptuner]

I added a pic to roughly show what's upstairs (left out some non-pertinent details).

There's a bathroom above the post (floor in front of sink). The tub is roughly where the beam starts.

The kitchen/garage wall is sitting on a curb, 2" above the slab. Looks like it's a perimeter/foundation curb so I'm sure it goes down at least 6". Where that end of the beam is picked up is covered by drywall but my guess is that it's picked up by a triple 2x4 post.