Finding the Fourth Proportional to 2,672.85, 4,008.63 and 1,028.55

Step by Step Solution

1. Step 1: Write the proportion equation
   2,672.85 : 4,008.63 = 1,028.55 : x
2. Step 2: Convert to fraction form
   2,672.85/4,008.63 = 1,028.55/x
3. Step 3: Cross multiply
   2,672.85x = 4,008.63 × 1,028.55
4. Step 4: Simplify right side
   2,672.85x = 4,123,076.39
5. Step 5: Solve for x
   x = 4,123,076.39/2,672.85
6. Step 6: Final answer
   x = 1,542.58