Finding the Fourth Proportional to 139.08, 191.72 and 116.94

Step by Step Solution

1. Step 1: Write the proportion equation
   139.08 : 191.72 = 116.94 : x
2. Step 2: Convert to fraction form
   139.08/191.72 = 116.94/x
3. Step 3: Cross multiply
   139.08x = 191.72 × 116.94
4. Step 4: Simplify right side
   139.08x = 22,419.15
5. Step 5: Solve for x
   x = 22,419.15/139.08
6. Step 6: Final answer
   x = 161.20