Finding the Fourth Proportional to 71,321.79, 98,425.50 and 39,491.82

Step by Step Solution

1. Step 1: Write the proportion equation
   71,321.79 : 98,425.50 = 39,491.82 : x
2. Step 2: Convert to fraction form
   71,321.79/98,425.50 = 39,491.82/x
3. Step 3: Cross multiply
   71,321.79x = 98,425.50 × 39,491.82
4. Step 4: Simplify right side
   71,321.79x = 3,887,002,129.41
5. Step 5: Solve for x
   x = 3,887,002,129.41/71,321.79
6. Step 6: Final answer
   x = 54,499.50