Finding the Fourth Proportional to 88,711.50, 133,103.79 and 65,139.42

Step by Step Solution

1. Step 1: Write the proportion equation
   88,711.50 : 133,103.79 = 65,139.42 : x
2. Step 2: Convert to fraction form
   88,711.50/133,103.79 = 65,139.42/x
3. Step 3: Cross multiply
   88,711.50x = 133,103.79 × 65,139.42
4. Step 4: Simplify right side
   88,711.50x = 8,670,303,680.40
5. Step 5: Solve for x
   x = 8,670,303,680.40/88,711.50
6. Step 6: Final answer
   x = 97,735.96