Finding the Fourth Proportional to 10,862.32, 14,981.06 and 9,131.08

Step by Step Solution

1. Step 1: Write the proportion equation
   10,862.32 : 14,981.06 = 9,131.08 : x
2. Step 2: Convert to fraction form
   10,862.32/14,981.06 = 9,131.08/x
3. Step 3: Cross multiply
   10,862.32x = 14,981.06 × 9,131.08
4. Step 4: Simplify right side
   10,862.32x = 136,793,257.34
5. Step 5: Solve for x
   x = 136,793,257.34/10,862.32
6. Step 6: Final answer
   x = 12,593.37