Finding the Fourth Proportional to 99,484.50, 137,405.25 and 65,892.18

Step by Step Solution

1. Step 1: Write the proportion equation
   99,484.50 : 137,405.25 = 65,892.18 : x
2. Step 2: Convert to fraction form
   99,484.50/137,405.25 = 65,892.18/x
3. Step 3: Cross multiply
   99,484.50x = 137,405.25 × 65,892.18
4. Step 4: Simplify right side
   99,484.50x = 9,053,931,465.95
5. Step 5: Solve for x
   x = 9,053,931,465.95/99,484.50
6. Step 6: Final answer
   x = 91,008.46