Finding the Fourth Proportional to 2,490.56, 3,733.61 and 1,028.78

Step by Step Solution

1. Step 1: Write the proportion equation
   2,490.56 : 3,733.61 = 1,028.78 : x
2. Step 2: Convert to fraction form
   2,490.56/3,733.61 = 1,028.78/x
3. Step 3: Cross multiply
   2,490.56x = 3,733.61 × 1,028.78
4. Step 4: Simplify right side
   2,490.56x = 3,841,039.48
5. Step 5: Solve for x
   x = 3,841,039.48/2,490.56
6. Step 6: Final answer
   x = 1,542.24