Finding the Fourth Proportional to 12,476.16, 17,222.72 and 8,229.72

Step by Step Solution

1. Step 1: Write the proportion equation
   12,476.16 : 17,222.72 = 8,229.72 : x
2. Step 2: Convert to fraction form
   12,476.16/17,222.72 = 8,229.72/x
3. Step 3: Cross multiply
   12,476.16x = 17,222.72 × 8,229.72
4. Step 4: Simplify right side
   12,476.16x = 141,738,163.24
5. Step 5: Solve for x
   x = 141,738,163.24/12,476.16
6. Step 6: Final answer
   x = 11,360.72