Finding the Fourth Proportional to 10,428.59, 14,391.41 and 5,712.88

Step by Step Solution

1. Step 1: Write the proportion equation
   10,428.59 : 14,391.41 = 5,712.88 : x
2. Step 2: Convert to fraction form
   10,428.59/14,391.41 = 5,712.88/x
3. Step 3: Cross multiply
   10,428.59x = 14,391.41 × 5,712.88
4. Step 4: Simplify right side
   10,428.59x = 82,216,398.36
5. Step 5: Solve for x
   x = 82,216,398.36/10,428.59
6. Step 6: Final answer
   x = 7,883.75