Finding the Fourth Proportional to 71,499.38, 98,669.22 and 39,668.54

Step by Step Solution

1. Step 1: Write the proportion equation
   71,499.38 : 98,669.22 = 39,668.54 : x
2. Step 2: Convert to fraction form
   71,499.38/98,669.22 = 39,668.54/x
3. Step 3: Cross multiply
   71,499.38x = 98,669.22 × 39,668.54
4. Step 4: Simplify right side
   71,499.38x = 3,914,063,900.34
5. Step 5: Solve for x
   x = 3,914,063,900.34/71,499.38
6. Step 6: Final answer
   x = 54,742.63