Finding the Fourth Proportional to 71,856.72, 99,163.31 and 41,644.13

Step by Step Solution

1. Step 1: Write the proportion equation
   71,856.72 : 99,163.31 = 41,644.13 : x
2. Step 2: Convert to fraction form
   71,856.72/99,163.31 = 41,644.13/x
3. Step 3: Cross multiply
   71,856.72x = 99,163.31 × 41,644.13
4. Step 4: Simplify right side
   71,856.72x = 4,129,569,068.83
5. Step 5: Solve for x
   x = 4,129,569,068.83/71,856.72
6. Step 6: Final answer
   x = 57,469.49