Finding the Fourth Proportional to 2,418.42, 3,626.01 and 1,638.39

Step by Step Solution

1. Step 1: Write the proportion equation
   2,418.42 : 3,626.01 = 1,638.39 : x
2. Step 2: Convert to fraction form
   2,418.42/3,626.01 = 1,638.39/x
3. Step 3: Cross multiply
   2,418.42x = 3,626.01 × 1,638.39
4. Step 4: Simplify right side
   2,418.42x = 5,940,818.52
5. Step 5: Solve for x
   x = 5,940,818.52/2,418.42
6. Step 6: Final answer
   x = 2,456.49