Finding the Fourth Proportional to 12,515.52, 17,269.71 and 7,478.69

Step by Step Solution

1. Step 1: Write the proportion equation
   12,515.52 : 17,269.71 = 7,478.69 : x
2. Step 2: Convert to fraction form
   12,515.52/17,269.71 = 7,478.69/x
3. Step 3: Cross multiply
   12,515.52x = 17,269.71 × 7,478.69
4. Step 4: Simplify right side
   12,515.52x = 129,154,721.13
5. Step 5: Solve for x
   x = 129,154,721.13/12,515.52
6. Step 6: Final answer
   x = 10,319.56