Finding the Fourth Proportional to 2,687.57, 4,029.92 and 1,227.05

Step by Step Solution

1. Step 1: Write the proportion equation
   2,687.57 : 4,029.92 = 1,227.05 : x
2. Step 2: Convert to fraction form
   2,687.57/4,029.92 = 1,227.05/x
3. Step 3: Cross multiply
   2,687.57x = 4,029.92 × 1,227.05
4. Step 4: Simplify right side
   2,687.57x = 4,944,907.20
5. Step 5: Solve for x
   x = 4,944,907.20/2,687.57
6. Step 6: Final answer
   x = 1,839.92