Finding the Fourth Proportional to 2,617.83, 3,612.42 and 1,438.65

Step by Step Solution

1. Step 1: Write the proportion equation
   2,617.83 : 3,612.42 = 1,438.65 : x
2. Step 2: Convert to fraction form
   2,617.83/3,612.42 = 1,438.65/x
3. Step 3: Cross multiply
   2,617.83x = 3,612.42 × 1,438.65
4. Step 4: Simplify right side
   2,617.83x = 5,197,008.03
5. Step 5: Solve for x
   x = 5,197,008.03/2,617.83
6. Step 6: Final answer
   x = 1,985.24