Finding the Fourth Proportional to 8,404.56, 12,605.52 and 3,209.28

Step by Step Solution

1. Step 1: Write the proportion equation
   8,404.56 : 12,605.52 = 3,209.28 : x
2. Step 2: Convert to fraction form
   8,404.56/12,605.52 = 3,209.28/x
3. Step 3: Cross multiply
   8,404.56x = 12,605.52 × 3,209.28
4. Step 4: Simplify right side
   8,404.56x = 40,454,643.23
5. Step 5: Solve for x
   x = 40,454,643.23/8,404.56
6. Step 6: Final answer
   x = 4,813.42