Finding the Fourth Proportional to 8,560.56, 12,840.78 and 2,404.56

Step by Step Solution

1. Step 1: Write the proportion equation
   8,560.56 : 12,840.78 = 2,404.56 : x
2. Step 2: Convert to fraction form
   8,560.56/12,840.78 = 2,404.56/x
3. Step 3: Cross multiply
   8,560.56x = 12,840.78 × 2,404.56
4. Step 4: Simplify right side
   8,560.56x = 30,876,425.96
5. Step 5: Solve for x
   x = 30,876,425.96/8,560.56
6. Step 6: Final answer
   x = 3,606.82