Finding the Fourth Proportional to 12,980.28, 17,915.78 and 7,605.24

Step by Step Solution

1. Step 1: Write the proportion equation
   12,980.28 : 17,915.78 = 7,605.24 : x
2. Step 2: Convert to fraction form
   12,980.28/17,915.78 = 7,605.24/x
3. Step 3: Cross multiply
   12,980.28x = 17,915.78 × 7,605.24
4. Step 4: Simplify right side
   12,980.28x = 136,253,806.69
5. Step 5: Solve for x
   x = 136,253,806.69/12,980.28
6. Step 6: Final answer
   x = 10,496.99