Finding the Fourth Proportional to 12,145.25, 16,767.74 and 7,960.79

Step by Step Solution

1. Step 1: Write the proportion equation
   12,145.25 : 16,767.74 = 7,960.79 : x
2. Step 2: Convert to fraction form
   12,145.25/16,767.74 = 7,960.79/x
3. Step 3: Cross multiply
   12,145.25x = 16,767.74 × 7,960.79
4. Step 4: Simplify right side
   12,145.25x = 133,484,456.91
5. Step 5: Solve for x
   x = 133,484,456.91/12,145.25
6. Step 6: Final answer
   x = 10,990.67