Finding the Fourth Proportional to 8,599.50, 12,900 and 2,443.50

Step by Step Solution

1. Step 1: Write the proportion equation
   8,599.50 : 12,900 = 2,443.50 : x
2. Step 2: Convert to fraction form
   8,599.50/12,900 = 2,443.50/x
3. Step 3: Cross multiply
   8,599.50x = 12,900 × 2,443.50
4. Step 4: Simplify right side
   8,599.50x = 31,521,150
5. Step 5: Solve for x
   x = 31,521,150/8,599.50
6. Step 6: Final answer
   x = 3,665.46