Finding the Fourth Proportional to 9,165.12, 12,636.72 and 8,057.04

Step by Step Solution

1. Step 1: Write the proportion equation
   9,165.12 : 12,636.72 = 8,057.04 : x
2. Step 2: Convert to fraction form
   9,165.12/12,636.72 = 8,057.04/x
3. Step 3: Cross multiply
   9,165.12x = 12,636.72 × 8,057.04
4. Step 4: Simplify right side
   9,165.12x = 101,814,558.51
5. Step 5: Solve for x
   x = 101,814,558.51/9,165.12
6. Step 6: Final answer
   x = 11,108.92