Finding the Fourth Proportional to 99,810.52, 148,951.92 and 89,160.95

Step by Step Solution

1. Step 1: Write the proportion equation
   99,810.52 : 148,951.92 = 89,160.95 : x
2. Step 2: Convert to fraction form
   99,810.52/148,951.92 = 89,160.95/x
3. Step 3: Cross multiply
   99,810.52x = 148,951.92 × 89,160.95
4. Step 4: Simplify right side
   99,810.52x = 13,280,694,245.72
5. Step 5: Solve for x
   x = 13,280,694,245.72/99,810.52
6. Step 6: Final answer
   x = 133,059.06