Finding the Fourth Proportional to 12,155.20, 16,769.43 and 8,976.15

Step by Step Solution

1. Step 1: Write the proportion equation
   12,155.20 : 16,769.43 = 8,976.15 : x
2. Step 2: Convert to fraction form
   12,155.20/16,769.43 = 8,976.15/x
3. Step 3: Cross multiply
   12,155.20x = 16,769.43 × 8,976.15
4. Step 4: Simplify right side
   12,155.20x = 150,524,919.09
5. Step 5: Solve for x
   x = 150,524,919.09/12,155.20
6. Step 6: Final answer
   x = 12,383.58