Finding the Fourth Proportional to 259,929, 389,833.56 and 82,402.92

Step by Step Solution

1. Step 1: Write the proportion equation
   259,929 : 389,833.56 = 82,402.92 : x
2. Step 2: Convert to fraction form
   259,929/389,833.56 = 82,402.92/x
3. Step 3: Cross multiply
   259,929x = 389,833.56 × 82,402.92
4. Step 4: Simplify right side
   259,929x = 32,123,423,658.00
5. Step 5: Solve for x
   x = 32,123,423,658.00/259,929
6. Step 6: Final answer
   x = 123,585.38