Finding the Fourth Proportional to 71,743.72, 99,004.98 and 39,912.52

Step by Step Solution

1. Step 1: Write the proportion equation
   71,743.72 : 99,004.98 = 39,912.52 : x
2. Step 2: Convert to fraction form
   71,743.72/99,004.98 = 39,912.52/x
3. Step 3: Cross multiply
   71,743.72x = 99,004.98 × 39,912.52
4. Step 4: Simplify right side
   71,743.72x = 3,951,538,244.35
5. Step 5: Solve for x
   x = 3,951,538,244.35/71,743.72
6. Step 6: Final answer
   x = 55,078.52