Finding the Fourth Proportional to 12,150.16, 16,778.28 and 9,160.88

Step by Step Solution

1. Step 1: Write the proportion equation
   12,150.16 : 16,778.28 = 9,160.88 : x
2. Step 2: Convert to fraction form
   12,150.16/16,778.28 = 9,160.88/x
3. Step 3: Cross multiply
   12,150.16x = 16,778.28 × 9,160.88
4. Step 4: Simplify right side
   12,150.16x = 153,703,809.69
5. Step 5: Solve for x
   x = 153,703,809.69/12,150.16
6. Step 6: Final answer
   x = 12,650.35