Finding the Fourth Proportional to 8,574.08, 12,857.72 and 3,306.15

Step by Step Solution

1. Step 1: Write the proportion equation
   8,574.08 : 12,857.72 = 3,306.15 : x
2. Step 2: Convert to fraction form
   8,574.08/12,857.72 = 3,306.15/x
3. Step 3: Cross multiply
   8,574.08x = 12,857.72 × 3,306.15
4. Step 4: Simplify right side
   8,574.08x = 42,509,534.45
5. Step 5: Solve for x
   x = 42,509,534.45/8,574.08
6. Step 6: Final answer
   x = 4,957.91