Finding the Fourth Proportional to 71,745.72, 99,007.74 and 39,914.52

Step by Step Solution

1. Step 1: Write the proportion equation
   71,745.72 : 99,007.74 = 39,914.52 : x
2. Step 2: Convert to fraction form
   71,745.72/99,007.74 = 39,914.52/x
3. Step 3: Cross multiply
   71,745.72x = 99,007.74 × 39,914.52
4. Step 4: Simplify right side
   71,745.72x = 3,951,846,418.38
5. Step 5: Solve for x
   x = 3,951,846,418.38/71,745.72
6. Step 6: Final answer
   x = 55,081.28