Finding the Fourth Proportional to 88,510.60, 133,025.10 and 77,105.80

Step by Step Solution

1. Step 1: Write the proportion equation
   88,510.60 : 133,025.10 = 77,105.80 : x
2. Step 2: Convert to fraction form
   88,510.60/133,025.10 = 77,105.80/x
3. Step 3: Cross multiply
   88,510.60x = 133,025.10 × 77,105.80
4. Step 4: Simplify right side
   88,510.60x = 10,257,006,755.58
5. Step 5: Solve for x
   x = 10,257,006,755.58/88,510.60
6. Step 6: Final answer
   x = 115,884.50