Finding the Fourth Proportional to 8,287.45, 12,426.90 and 2,443.30

Step by Step Solution

1. Step 1: Write the proportion equation
   8,287.45 : 12,426.90 = 2,443.30 : x
2. Step 2: Convert to fraction form
   8,287.45/12,426.90 = 2,443.30/x
3. Step 3: Cross multiply
   8,287.45x = 12,426.90 × 2,443.30
4. Step 4: Simplify right side
   8,287.45x = 30,362,644.77
5. Step 5: Solve for x
   x = 30,362,644.77/8,287.45
6. Step 6: Final answer
   x = 3,663.69