Finding the Fourth Proportional to 12,401.04, 18,561.12 and 9,113.28

Step by Step Solution

1. Step 1: Write the proportion equation
   12,401.04 : 18,561.12 = 9,113.28 : x
2. Step 2: Convert to fraction form
   12,401.04/18,561.12 = 9,113.28/x
3. Step 3: Cross multiply
   12,401.04x = 18,561.12 × 9,113.28
4. Step 4: Simplify right side
   12,401.04x = 169,152,683.67
5. Step 5: Solve for x
   x = 169,152,683.67/12,401.04
6. Step 6: Final answer
   x = 13,640.20