Finding the Fourth Proportional to 12,658.73, 17,469.47 and 7,945.61

Step by Step Solution

1. Step 1: Write the proportion equation
   12,658.73 : 17,469.47 = 7,945.61 : x
2. Step 2: Convert to fraction form
   12,658.73/17,469.47 = 7,945.61/x
3. Step 3: Cross multiply
   12,658.73x = 17,469.47 × 7,945.61
4. Step 4: Simplify right side
   12,658.73x = 138,805,528.04
5. Step 5: Solve for x
   x = 138,805,528.04/12,658.73
6. Step 6: Final answer
   x = 10,965.21