Finding the Fourth Proportional to 139.96, 209.04 and 111.10

Step by Step Solution

1. Step 1: Write the proportion equation
   139.96 : 209.04 = 111.10 : x
2. Step 2: Convert to fraction form
   139.96/209.04 = 111.10/x
3. Step 3: Cross multiply
   139.96x = 209.04 × 111.10
4. Step 4: Simplify right side
   139.96x = 23,223.79
5. Step 5: Solve for x
   x = 23,223.79/139.96
6. Step 6: Final answer
   x = 165.94