Finding the Fourth Proportional to 171,882.91, 257,831.34 and 81,879.34

Step by Step Solution

1. Step 1: Write the proportion equation
   171,882.91 : 257,831.34 = 81,879.34 : x
2. Step 2: Convert to fraction form
   171,882.91/257,831.34 = 81,879.34/x
3. Step 3: Cross multiply
   171,882.91x = 257,831.34 × 81,879.34
4. Step 4: Simplify right side
   171,882.91x = 21,111,059,950.52
5. Step 5: Solve for x
   x = 21,111,059,950.52/171,882.91
6. Step 6: Final answer
   x = 122,822.33