Finding the Fourth Proportional to 86,644.92, 129,909.78 and 31,233.72

Step by Step Solution

1. Step 1: Write the proportion equation
   86,644.92 : 129,909.78 = 31,233.72 : x
2. Step 2: Convert to fraction form
   86,644.92/129,909.78 = 31,233.72/x
3. Step 3: Cross multiply
   86,644.92x = 129,909.78 × 31,233.72
4. Step 4: Simplify right side
   86,644.92x = 4,057,565,693.78
5. Step 5: Solve for x
   x = 4,057,565,693.78/86,644.92
6. Step 6: Final answer
   x = 46,829.82