Finding the Fourth Proportional to 1,382.34, 2,062.85 and 1,139.34

Step by Step Solution

1. Step 1: Write the proportion equation
   1,382.34 : 2,062.85 = 1,139.34 : x
2. Step 2: Convert to fraction form
   1,382.34/2,062.85 = 1,139.34/x
3. Step 3: Cross multiply
   1,382.34x = 2,062.85 × 1,139.34
4. Step 4: Simplify right side
   1,382.34x = 2,350,287.52
5. Step 5: Solve for x
   x = 2,350,287.52/1,382.34
6. Step 6: Final answer
   x = 1,700.22