Finding the Fourth Proportional to 8,574.57, 12,861.36 and 3,308.55

Step by Step Solution

1. Step 1: Write the proportion equation
   8,574.57 : 12,861.36 = 3,308.55 : x
2. Step 2: Convert to fraction form
   8,574.57/12,861.36 = 3,308.55/x
3. Step 3: Cross multiply
   8,574.57x = 12,861.36 × 3,308.55
4. Step 4: Simplify right side
   8,574.57x = 42,552,452.63
5. Step 5: Solve for x
   x = 42,552,452.63/8,574.57
6. Step 6: Final answer
   x = 4,962.63