Finding the Fourth Proportional to 2,003.10, 3,003.20 and 1,028.50

Step by Step Solution

1. Step 1: Write the proportion equation
   2,003.10 : 3,003.20 = 1,028.50 : x
2. Step 2: Convert to fraction form
   2,003.10/3,003.20 = 1,028.50/x
3. Step 3: Cross multiply
   2,003.10x = 3,003.20 × 1,028.50
4. Step 4: Simplify right side
   2,003.10x = 3,088,791.20
5. Step 5: Solve for x
   x = 3,088,791.20/2,003.10
6. Step 6: Final answer
   x = 1,542.01