Finding the Fourth Proportional to 10,428.52, 14,391.42 and 5,712.82

Step by Step Solution

1. Step 1: Write the proportion equation
   10,428.52 : 14,391.42 = 5,712.82 : x
2. Step 2: Convert to fraction form
   10,428.52/14,391.42 = 5,712.82/x
3. Step 3: Cross multiply
   10,428.52x = 14,391.42 × 5,712.82
4. Step 4: Simplify right side
   10,428.52x = 82,215,592.00
5. Step 5: Solve for x
   x = 82,215,592.00/10,428.52
6. Step 6: Final answer
   x = 7,883.73