Finding the Fourth Proportional to 243,869.52, 365,729.88 and 86,061.12

Step by Step Solution

1. Step 1: Write the proportion equation
   243,869.52 : 365,729.88 = 86,061.12 : x
2. Step 2: Convert to fraction form
   243,869.52/365,729.88 = 86,061.12/x
3. Step 3: Cross multiply
   243,869.52x = 365,729.88 × 86,061.12
4. Step 4: Simplify right side
   243,869.52x = 31,475,123,090.27
5. Step 5: Solve for x
   x = 31,475,123,090.27/243,869.52
6. Step 6: Final answer
   x = 129,065.42