Finding the Fourth Proportional to 1,382.69, 2,073.47 and 689.10

Step by Step Solution

1. Step 1: Write the proportion equation
   1,382.69 : 2,073.47 = 689.10 : x
2. Step 2: Convert to fraction form
   1,382.69/2,073.47 = 689.10/x
3. Step 3: Cross multiply
   1,382.69x = 2,073.47 × 689.10
4. Step 4: Simplify right side
   1,382.69x = 1,428,824.73
5. Step 5: Solve for x
   x = 1,428,824.73/1,382.69
6. Step 6: Final answer
   x = 1,033.37