Finding the Fourth Proportional to 8,165.61, 12,250.79 and 2,618.83

Step by Step Solution

1. Step 1: Write the proportion equation
   8,165.61 : 12,250.79 = 2,618.83 : x
2. Step 2: Convert to fraction form
   8,165.61/12,250.79 = 2,618.83/x
3. Step 3: Cross multiply
   8,165.61x = 12,250.79 × 2,618.83
4. Step 4: Simplify right side
   8,165.61x = 32,082,763.15
5. Step 5: Solve for x
   x = 32,082,763.15/8,165.61
6. Step 6: Final answer
   x = 3,929.01