Finding the Fourth Proportional to 2,426.39, 3,640.40 and 965.15

Step by Step Solution

1. Step 1: Write the proportion equation
   2,426.39 : 3,640.40 = 965.15 : x
2. Step 2: Convert to fraction form
   2,426.39/3,640.40 = 965.15/x
3. Step 3: Cross multiply
   2,426.39x = 3,640.40 × 965.15
4. Step 4: Simplify right side
   2,426.39x = 3,513,527.23
5. Step 5: Solve for x
   x = 3,513,527.23/2,426.39
6. Step 6: Final answer
   x = 1,448.05