Finding the Fourth Proportional to 71,500.16, 98,668.91 and 39,668.38

Step by Step Solution

1. Step 1: Write the proportion equation
   71,500.16 : 98,668.91 = 39,668.38 : x
2. Step 2: Convert to fraction form
   71,500.16/98,668.91 = 39,668.38/x
3. Step 3: Cross multiply
   71,500.16x = 98,668.91 × 39,668.38
4. Step 4: Simplify right side
   71,500.16x = 3,914,035,371.05
5. Step 5: Solve for x
   x = 3,914,035,371.05/71,500.16
6. Step 6: Final answer
   x = 54,741.63