Finding the Fourth Proportional to 8,766.65, 13,155.72 and 3,220.04

Step by Step Solution

1. Step 1: Write the proportion equation
   8,766.65 : 13,155.72 = 3,220.04 : x
2. Step 2: Convert to fraction form
   8,766.65/13,155.72 = 3,220.04/x
3. Step 3: Cross multiply
   8,766.65x = 13,155.72 × 3,220.04
4. Step 4: Simplify right side
   8,766.65x = 42,361,918.61
5. Step 5: Solve for x
   x = 42,361,918.61/8,766.65
6. Step 6: Final answer
   x = 4,832.17