Finding the Fourth Proportional to 12,404.88, 17,122.73 and 7,940.66

Step by Step Solution

1. Step 1: Write the proportion equation
   12,404.88 : 17,122.73 = 7,940.66 : x
2. Step 2: Convert to fraction form
   12,404.88/17,122.73 = 7,940.66/x
3. Step 3: Cross multiply
   12,404.88x = 17,122.73 × 7,940.66
4. Step 4: Simplify right side
   12,404.88x = 135,965,651.88
5. Step 5: Solve for x
   x = 135,965,651.88/12,404.88
6. Step 6: Final answer
   x = 10,960.66