Finding the Fourth Proportional to 10,425.80, 14,387.06 and 5,709.17

Step by Step Solution

1. Step 1: Write the proportion equation
   10,425.80 : 14,387.06 = 5,709.17 : x
2. Step 2: Convert to fraction form
   10,425.80/14,387.06 = 5,709.17/x
3. Step 3: Cross multiply
   10,425.80x = 14,387.06 × 5,709.17
4. Step 4: Simplify right side
   10,425.80x = 82,138,070.86
5. Step 5: Solve for x
   x = 82,138,070.86/10,425.80
6. Step 6: Final answer
   x = 7,878.35