Finding the Fourth Proportional to 10,425.80, 14,387.60 and 5,710.07

Step by Step Solution

1. Step 1: Write the proportion equation
   10,425.80 : 14,387.60 = 5,710.07 : x
2. Step 2: Convert to fraction form
   10,425.80/14,387.60 = 5,710.07/x
3. Step 3: Cross multiply
   10,425.80x = 14,387.60 × 5,710.07
4. Step 4: Simplify right side
   10,425.80x = 82,154,253.38
5. Step 5: Solve for x
   x = 82,154,253.38/10,425.80
6. Step 6: Final answer
   x = 7,879.90