Finding the Fourth Proportional to 2,617.39, 3,612 and 1,438.55

Step by Step Solution

1. Step 1: Write the proportion equation
   2,617.39 : 3,612 = 1,438.55 : x
2. Step 2: Convert to fraction form
   2,617.39/3,612 = 1,438.55/x
3. Step 3: Cross multiply
   2,617.39x = 3,612 × 1,438.55
4. Step 4: Simplify right side
   2,617.39x = 5,196,033.57
5. Step 5: Solve for x
   x = 5,196,033.57/2,617.39
6. Step 6: Final answer
   x = 1,985.20