Finding the Fourth Proportional to 8,581.50, 12,874.50 and 2,425.50

Step by Step Solution

1. Step 1: Write the proportion equation
   8,581.50 : 12,874.50 = 2,425.50 : x
2. Step 2: Convert to fraction form
   8,581.50/12,874.50 = 2,425.50/x
3. Step 3: Cross multiply
   8,581.50x = 12,874.50 × 2,425.50
4. Step 4: Simplify right side
   8,581.50x = 31,227,099.75
5. Step 5: Solve for x
   x = 31,227,099.75/8,581.50
6. Step 6: Final answer
   x = 3,638.89