Finding the Fourth Proportional to 10,869.18, 14,941.72 and 9,351.16

Step by Step Solution

1. Step 1: Write the proportion equation
   10,869.18 : 14,941.72 = 9,351.16 : x
2. Step 2: Convert to fraction form
   10,869.18/14,941.72 = 9,351.16/x
3. Step 3: Cross multiply
   10,869.18x = 14,941.72 × 9,351.16
4. Step 4: Simplify right side
   10,869.18x = 139,722,414.40
5. Step 5: Solve for x
   x = 139,722,414.40/10,869.18
6. Step 6: Final answer
   x = 12,854.92