Finding the Fourth Proportional to 8,494.56, 12,728.88 and 3,872.16

Step by Step Solution

1. Step 1: Write the proportion equation
   8,494.56 : 12,728.88 = 3,872.16 : x
2. Step 2: Convert to fraction form
   8,494.56/12,728.88 = 3,872.16/x
3. Step 3: Cross multiply
   8,494.56x = 12,728.88 × 3,872.16
4. Step 4: Simplify right side
   8,494.56x = 49,288,259.98
5. Step 5: Solve for x
   x = 49,288,259.98/8,494.56
6. Step 6: Final answer
   x = 5,802.33