Finding the Fourth Proportional to 12,515.50, 17,275.24 and 7,213.86

Step by Step Solution

1. Step 1: Write the proportion equation
   12,515.50 : 17,275.24 = 7,213.86 : x
2. Step 2: Convert to fraction form
   12,515.50/17,275.24 = 7,213.86/x
3. Step 3: Cross multiply
   12,515.50x = 17,275.24 × 7,213.86
4. Step 4: Simplify right side
   12,515.50x = 124,621,162.83
5. Step 5: Solve for x
   x = 124,621,162.83/12,515.50
6. Step 6: Final answer
   x = 9,957.35