Finding the Fourth Proportional to 12,144.38, 16,766.53 and 7,959.92

Step by Step Solution

1. Step 1: Write the proportion equation
   12,144.38 : 16,766.53 = 7,959.92 : x
2. Step 2: Convert to fraction form
   12,144.38/16,766.53 = 7,959.92/x
3. Step 3: Cross multiply
   12,144.38x = 16,766.53 × 7,959.92
4. Step 4: Simplify right side
   12,144.38x = 133,460,133.75
5. Step 5: Solve for x
   x = 133,460,133.75/12,144.38
6. Step 6: Final answer
   x = 10,989.46