Finding the Fourth Proportional to 9,131.92, 12,654.16 and 8,577.04

Step by Step Solution

1. Step 1: Write the proportion equation
   9,131.92 : 12,654.16 = 8,577.04 : x
2. Step 2: Convert to fraction form
   9,131.92/12,654.16 = 8,577.04/x
3. Step 3: Cross multiply
   9,131.92x = 12,654.16 × 8,577.04
4. Step 4: Simplify right side
   9,131.92x = 108,535,236.49
5. Step 5: Solve for x
   x = 108,535,236.49/9,131.92
6. Step 6: Final answer
   x = 11,885.26