Finding the Fourth Proportional to 12,155.40, 16,752.42 and 9,006.12

Step by Step Solution

1. Step 1: Write the proportion equation
   12,155.40 : 16,752.42 = 9,006.12 : x
2. Step 2: Convert to fraction form
   12,155.40/16,752.42 = 9,006.12/x
3. Step 3: Cross multiply
   12,155.40x = 16,752.42 × 9,006.12
4. Step 4: Simplify right side
   12,155.40x = 150,874,304.81
5. Step 5: Solve for x
   x = 150,874,304.81/12,155.40
6. Step 6: Final answer
   x = 12,412.12