Finding the Fourth Proportional to 12,402.86, 17,116.31 and 7,025.20

Step by Step Solution

1. Step 1: Write the proportion equation
   12,402.86 : 17,116.31 = 7,025.20 : x
2. Step 2: Convert to fraction form
   12,402.86/17,116.31 = 7,025.20/x
3. Step 3: Cross multiply
   12,402.86x = 17,116.31 × 7,025.20
4. Step 4: Simplify right side
   12,402.86x = 120,245,475.78
5. Step 5: Solve for x
   x = 120,245,475.78/12,402.86
6. Step 6: Final answer
   x = 9,694.98