Finding the Fourth Proportional to 6,217.88, 8,581.50 and 3,564.78

Step by Step Solution

1. Step 1: Write the proportion equation
   6,217.88 : 8,581.50 = 3,564.78 : x
2. Step 2: Convert to fraction form
   6,217.88/8,581.50 = 3,564.78/x
3. Step 3: Cross multiply
   6,217.88x = 8,581.50 × 3,564.78
4. Step 4: Simplify right side
   6,217.88x = 30,591,141.75
5. Step 5: Solve for x
   x = 30,591,141.75/6,217.88
6. Step 6: Final answer
   x = 4,919.87