Finding the Fourth Proportional to 6,215.62, 8,578.22 and 3,563.89

Step by Step Solution

1. Step 1: Write the proportion equation
   6,215.62 : 8,578.22 = 3,563.89 : x
2. Step 2: Convert to fraction form
   6,215.62/8,578.22 = 3,563.89/x
3. Step 3: Cross multiply
   6,215.62x = 8,578.22 × 3,563.89
4. Step 4: Simplify right side
   6,215.62x = 30,571,832.48
5. Step 5: Solve for x
   x = 30,571,832.48/6,215.62
6. Step 6: Final answer
   x = 4,918.55