Finding the Fourth Proportional to 1,086.28, 1,628.38 and 695.18

Step by Step Solution

1. Step 1: Write the proportion equation
   1,086.28 : 1,628.38 = 695.18 : x
2. Step 2: Convert to fraction form
   1,086.28/1,628.38 = 695.18/x
3. Step 3: Cross multiply
   1,086.28x = 1,628.38 × 695.18
4. Step 4: Simplify right side
   1,086.28x = 1,132,017.21
5. Step 5: Solve for x
   x = 1,132,017.21/1,086.28
6. Step 6: Final answer
   x = 1,042.10