Finding the Fourth Proportional to 2,443.18, 3,665.40 and 862.30

Step by Step Solution

1. Step 1: Write the proportion equation
   2,443.18 : 3,665.40 = 862.30 : x
2. Step 2: Convert to fraction form
   2,443.18/3,665.40 = 862.30/x
3. Step 3: Cross multiply
   2,443.18x = 3,665.40 × 862.30
4. Step 4: Simplify right side
   2,443.18x = 3,160,660.00
5. Step 5: Solve for x
   x = 3,160,660.00/2,443.18
6. Step 6: Final answer
   x = 1,293.67