Finding the Fourth Proportional to 71,500.32, 98,668.80 and 39,668.76

Step by Step Solution

1. Step 1: Write the proportion equation
   71,500.32 : 98,668.80 = 39,668.76 : x
2. Step 2: Convert to fraction form
   71,500.32/98,668.80 = 39,668.76/x
3. Step 3: Cross multiply
   71,500.32x = 98,668.80 × 39,668.76
4. Step 4: Simplify right side
   71,500.32x = 3,914,068,946.69
5. Step 5: Solve for x
   x = 3,914,068,946.69/71,500.32
6. Step 6: Final answer
   x = 54,741.98