Finding the Fourth Proportional to 2,617.57, 3,612.27 and 1,438.69

Step by Step Solution

1. Step 1: Write the proportion equation
   2,617.57 : 3,612.27 = 1,438.69 : x
2. Step 2: Convert to fraction form
   2,617.57/3,612.27 = 1,438.69/x
3. Step 3: Cross multiply
   2,617.57x = 3,612.27 × 1,438.69
4. Step 4: Simplify right side
   2,617.57x = 5,196,936.73
5. Step 5: Solve for x
   x = 5,196,936.73/2,617.57
6. Step 6: Final answer
   x = 1,985.41