Finding the Fourth Proportional to 89,025, 133,345.52 and 83,790.78

Step by Step Solution

1. Step 1: Write the proportion equation
   89,025 : 133,345.52 = 83,790.78 : x
2. Step 2: Convert to fraction form
   89,025/133,345.52 = 83,790.78/x
3. Step 3: Cross multiply
   89,025x = 133,345.52 × 83,790.78
4. Step 4: Simplify right side
   89,025x = 11,173,125,130.31
5. Step 5: Solve for x
   x = 11,173,125,130.31/89,025
6. Step 6: Final answer
   x = 125,505.48