Finding the Fourth Proportional to 1,151.24, 1,724.69 and 681.31

Step by Step Solution

1. Step 1: Write the proportion equation
   1,151.24 : 1,724.69 = 681.31 : x
2. Step 2: Convert to fraction form
   1,151.24/1,724.69 = 681.31/x
3. Step 3: Cross multiply
   1,151.24x = 1,724.69 × 681.31
4. Step 4: Simplify right side
   1,151.24x = 1,175,048.54
5. Step 5: Solve for x
   x = 1,175,048.54/1,151.24
6. Step 6: Final answer
   x = 1,020.68