Finding the Fourth Proportional to 72,807.22, 109,171.68 and 42,831.82

Step by Step Solution

1. Step 1: Write the proportion equation
   72,807.22 : 109,171.68 = 42,831.82 : x
2. Step 2: Convert to fraction form
   72,807.22/109,171.68 = 42,831.82/x
3. Step 3: Cross multiply
   72,807.22x = 109,171.68 × 42,831.82
4. Step 4: Simplify right side
   72,807.22x = 4,676,021,746.86
5. Step 5: Solve for x
   x = 4,676,021,746.86/72,807.22
6. Step 6: Final answer
   x = 64,224.70