Finding the Fourth Proportional to 10,429.20, 14,391.72 and 5,712.54

Step by Step Solution

1. Step 1: Write the proportion equation
   10,429.20 : 14,391.72 = 5,712.54 : x
2. Step 2: Convert to fraction form
   10,429.20/14,391.72 = 5,712.54/x
3. Step 3: Cross multiply
   10,429.20x = 14,391.72 × 5,712.54
4. Step 4: Simplify right side
   10,429.20x = 82,213,276.17
5. Step 5: Solve for x
   x = 82,213,276.17/10,429.20
6. Step 6: Final answer
   x = 7,882.99