Finding the Fourth Proportional to 259,831.92, 389,758.72 and 82,335

Step by Step Solution

1. Step 1: Write the proportion equation
   259,831.92 : 389,758.72 = 82,335 : x
2. Step 2: Convert to fraction form
   259,831.92/389,758.72 = 82,335/x
3. Step 3: Cross multiply
   259,831.92x = 389,758.72 × 82,335
4. Step 4: Simplify right side
   259,831.92x = 32,090,784,211.20
5. Step 5: Solve for x
   x = 32,090,784,211.20/259,831.92
6. Step 6: Final answer
   x = 123,505.93