Finding the Fourth Proportional to 1,086.57, 1,498.91 and 755.28

Step by Step Solution

1. Step 1: Write the proportion equation
   1,086.57 : 1,498.91 = 755.28 : x
2. Step 2: Convert to fraction form
   1,086.57/1,498.91 = 755.28/x
3. Step 3: Cross multiply
   1,086.57x = 1,498.91 × 755.28
4. Step 4: Simplify right side
   1,086.57x = 1,132,092.97
5. Step 5: Solve for x
   x = 1,132,092.97/1,086.57
6. Step 6: Final answer
   x = 1,041.90