Finding the Fourth Proportional to 2,640.90, 3,644.55 and 1,461.97

Step by Step Solution

1. Step 1: Write the proportion equation
   2,640.90 : 3,644.55 = 1,461.97 : x
2. Step 2: Convert to fraction form
   2,640.90/3,644.55 = 1,461.97/x
3. Step 3: Cross multiply
   2,640.90x = 3,644.55 × 1,461.97
4. Step 4: Simplify right side
   2,640.90x = 5,328,222.76
5. Step 5: Solve for x
   x = 5,328,222.76/2,640.90
6. Step 6: Final answer
   x = 2,017.58