Finding the Fourth Proportional to 2,638.98, 3,641.34 and 1,644.57

Step by Step Solution

1. Step 1: Write the proportion equation
   2,638.98 : 3,641.34 = 1,644.57 : x
2. Step 2: Convert to fraction form
   2,638.98/3,641.34 = 1,644.57/x
3. Step 3: Cross multiply
   2,638.98x = 3,641.34 × 1,644.57
4. Step 4: Simplify right side
   2,638.98x = 5,988,438.52
5. Step 5: Solve for x
   x = 5,988,438.52/2,638.98
6. Step 6: Final answer
   x = 2,269.22