Finding the Fourth Proportional to 71,742.50, 99,004.57 and 39,910.71

Step by Step Solution

1. Step 1: Write the proportion equation
   71,742.50 : 99,004.57 = 39,910.71 : x
2. Step 2: Convert to fraction form
   71,742.50/99,004.57 = 39,910.71/x
3. Step 3: Cross multiply
   71,742.50x = 99,004.57 × 39,910.71
4. Step 4: Simplify right side
   71,742.50x = 3,951,342,582.17
5. Step 5: Solve for x
   x = 3,951,342,582.17/71,742.50
6. Step 6: Final answer
   x = 55,076.74