Find the measure of the unknown angle.111.6°108.8°84.2°?

The problem seems to be asking for the measure of the fourth angle in a quadrilateral. The sum of the angles in a quadrilateral is 360 degrees.

Here are the steps to find the unknown angle:

1. Add up the given angles: 111.6° + 108.8° + 84.2° = 304.6°
2. Subtract this sum from 360° to find the measure of the unknown angle: 360° - 304.6° = 55.4°

So, the measure of the unknown angle is 55.4°.