Finding the Fourth Proportional to 1,382.66, 2,074.49 and 689.27

Step by Step Solution

1. Step 1: Write the proportion equation
   1,382.66 : 2,074.49 = 689.27 : x
2. Step 2: Convert to fraction form
   1,382.66/2,074.49 = 689.27/x
3. Step 3: Cross multiply
   1,382.66x = 2,074.49 × 689.27
4. Step 4: Simplify right side
   1,382.66x = 1,429,890.63
5. Step 5: Solve for x
   x = 1,429,890.63/1,382.66
6. Step 6: Final answer
   x = 1,034.16