Finding the Fourth Proportional to 86,156.49, 129,234.85 and 41,789.78

Step by Step Solution

1. Step 1: Write the proportion equation
   86,156.49 : 129,234.85 = 41,789.78 : x
2. Step 2: Convert to fraction form
   86,156.49/129,234.85 = 41,789.78/x
3. Step 3: Cross multiply
   86,156.49x = 129,234.85 × 41,789.78
4. Step 4: Simplify right side
   86,156.49x = 5,400,695,949.83
5. Step 5: Solve for x
   x = 5,400,695,949.83/86,156.49
6. Step 6: Final answer
   x = 62,684.73