Finding the Fourth Proportional to 71,025.12, 106,562.52 and 31,578.48

Step by Step Solution

1. Step 1: Write the proportion equation
   71,025.12 : 106,562.52 = 31,578.48 : x
2. Step 2: Convert to fraction form
   71,025.12/106,562.52 = 31,578.48/x
3. Step 3: Cross multiply
   71,025.12x = 106,562.52 × 31,578.48
4. Step 4: Simplify right side
   71,025.12x = 3,365,082,406.57
5. Step 5: Solve for x
   x = 3,365,082,406.57/71,025.12
6. Step 6: Final answer
   x = 47,378.76