Finding the Fourth Proportional to 12,149.69, 16,767.34 and 9,160.25

Step by Step Solution

1. Step 1: Write the proportion equation
   12,149.69 : 16,767.34 = 9,160.25 : x
2. Step 2: Convert to fraction form
   12,149.69/16,767.34 = 9,160.25/x
3. Step 3: Cross multiply
   12,149.69x = 16,767.34 × 9,160.25
4. Step 4: Simplify right side
   12,149.69x = 153,592,919.50
5. Step 5: Solve for x
   x = 153,592,919.50/12,149.69
6. Step 6: Final answer
   x = 12,641.72