Finding the Fourth Proportional to 2,426.40, 3,640.98 and 945.43

Step by Step Solution

1. Step 1: Write the proportion equation
   2,426.40 : 3,640.98 = 945.43 : x
2. Step 2: Convert to fraction form
   2,426.40/3,640.98 = 945.43/x
3. Step 3: Cross multiply
   2,426.40x = 3,640.98 × 945.43
4. Step 4: Simplify right side
   2,426.40x = 3,442,291.72
5. Step 5: Solve for x
   x = 3,442,291.72/2,426.40
6. Step 6: Final answer
   x = 1,418.68