Finding the Fourth Proportional to 8,566.33, 12,855.98 and 3,639.42

Step by Step Solution

1. Step 1: Write the proportion equation
   8,566.33 : 12,855.98 = 3,639.42 : x
2. Step 2: Convert to fraction form
   8,566.33/12,855.98 = 3,639.42/x
3. Step 3: Cross multiply
   8,566.33x = 12,855.98 × 3,639.42
4. Step 4: Simplify right side
   8,566.33x = 46,788,368.04
5. Step 5: Solve for x
   x = 46,788,368.04/8,566.33
6. Step 6: Final answer
   x = 5,461.89