Finding the Fourth Proportional to 12,424.25, 17,151.18 and 7,711.31

Step by Step Solution

1. Step 1: Write the proportion equation
   12,424.25 : 17,151.18 = 7,711.31 : x
2. Step 2: Convert to fraction form
   12,424.25/17,151.18 = 7,711.31/x
3. Step 3: Cross multiply
   12,424.25x = 17,151.18 × 7,711.31
4. Step 4: Simplify right side
   12,424.25x = 132,258,065.85
5. Step 5: Solve for x
   x = 132,258,065.85/12,424.25
6. Step 6: Final answer
   x = 10,645.15