Finding the Fourth Proportional to 12,516.28, 17,271.29 and 7,479.49

Step by Step Solution

1. Step 1: Write the proportion equation
   12,516.28 : 17,271.29 = 7,479.49 : x
2. Step 2: Convert to fraction form
   12,516.28/17,271.29 = 7,479.49/x
3. Step 3: Cross multiply
   12,516.28x = 17,271.29 × 7,479.49
4. Step 4: Simplify right side
   12,516.28x = 129,180,440.84
5. Step 5: Solve for x
   x = 129,180,440.84/12,516.28
6. Step 6: Final answer
   x = 10,320.99