Finding the Fourth Proportional to 99,740.88, 137,622.32 and 63,456.72

Step by Step Solution

1. Step 1: Write the proportion equation
   99,740.88 : 137,622.32 = 63,456.72 : x
2. Step 2: Convert to fraction form
   99,740.88/137,622.32 = 63,456.72/x
3. Step 3: Cross multiply
   99,740.88x = 137,622.32 × 63,456.72
4. Step 4: Simplify right side
   99,740.88x = 8,733,061,025.99
5. Step 5: Solve for x
   x = 8,733,061,025.99/99,740.88
6. Step 6: Final answer
   x = 87,557.49