Finding the Fourth Proportional to 1,067.68, 1,590.57 and 1,028.50

Step by Step Solution

1. Step 1: Write the proportion equation
   1,067.68 : 1,590.57 = 1,028.50 : x
2. Step 2: Convert to fraction form
   1,067.68/1,590.57 = 1,028.50/x
3. Step 3: Cross multiply
   1,067.68x = 1,590.57 × 1,028.50
4. Step 4: Simplify right side
   1,067.68x = 1,635,897.27
5. Step 5: Solve for x
   x = 1,635,897.27/1,067.68
6. Step 6: Final answer
   x = 1,532.20