Finding the Fourth Proportional to 8,582.16, 12,870.52 and 4,420.88

Step by Step Solution

1. Step 1: Write the proportion equation
   8,582.16 : 12,870.52 = 4,420.88 : x
2. Step 2: Convert to fraction form
   8,582.16/12,870.52 = 4,420.88/x
3. Step 3: Cross multiply
   8,582.16x = 12,870.52 × 4,420.88
4. Step 4: Simplify right side
   8,582.16x = 56,899,024.46
5. Step 5: Solve for x
   x = 56,899,024.46/8,582.16
6. Step 6: Final answer
   x = 6,629.92