Finding the Fourth Proportional to 71,499.71, 98,658.81 and 39,668.74

Step by Step Solution

1. Step 1: Write the proportion equation
   71,499.71 : 98,658.81 = 39,668.74 : x
2. Step 2: Convert to fraction form
   71,499.71/98,658.81 = 39,668.74/x
3. Step 3: Cross multiply
   71,499.71x = 98,658.81 × 39,668.74
4. Step 4: Simplify right side
   71,499.71x = 3,913,670,435.95
5. Step 5: Solve for x
   x = 3,913,670,435.95/71,499.71
6. Step 6: Final answer
   x = 54,736.87