Finding the Fourth Proportional to 99,695.67, 137,545.59 and 63,905.43

Step by Step Solution

1. Step 1: Write the proportion equation
   99,695.67 : 137,545.59 = 63,905.43 : x
2. Step 2: Convert to fraction form
   99,695.67/137,545.59 = 63,905.43/x
3. Step 3: Cross multiply
   99,695.67x = 137,545.59 × 63,905.43
4. Step 4: Simplify right side
   99,695.67x = 8,789,910,073.55
5. Step 5: Solve for x
   x = 8,789,910,073.55/99,695.67
6. Step 6: Final answer
   x = 88,167.42