Finding the Fourth Proportional to 12,401.10, 17,113.05 and 7,685.28

Step by Step Solution

1. Step 1: Write the proportion equation
   12,401.10 : 17,113.05 = 7,685.28 : x
2. Step 2: Convert to fraction form
   12,401.10/17,113.05 = 7,685.28/x
3. Step 3: Cross multiply
   12,401.10x = 17,113.05 × 7,685.28
4. Step 4: Simplify right side
   12,401.10x = 131,518,580.90
5. Step 5: Solve for x
   x = 131,518,580.90/12,401.10
6. Step 6: Final answer
   x = 10,605.40