Finding the Fourth Proportional to 2,640.17, 3,961.41 and 1,254.49

Step by Step Solution

1. Step 1: Write the proportion equation
   2,640.17 : 3,961.41 = 1,254.49 : x
2. Step 2: Convert to fraction form
   2,640.17/3,961.41 = 1,254.49/x
3. Step 3: Cross multiply
   2,640.17x = 3,961.41 × 1,254.49
4. Step 4: Simplify right side
   2,640.17x = 4,969,523.15
5. Step 5: Solve for x
   x = 4,969,523.15/2,640.17
6. Step 6: Final answer
   x = 1,882.27