Finding the Fourth Proportional to 1,389.22, 2,082.71 and 695.39

Step by Step Solution

1. Step 1: Write the proportion equation
   1,389.22 : 2,082.71 = 695.39 : x
2. Step 2: Convert to fraction form
   1,389.22/2,082.71 = 695.39/x
3. Step 3: Cross multiply
   1,389.22x = 2,082.71 × 695.39
4. Step 4: Simplify right side
   1,389.22x = 1,448,287.03
5. Step 5: Solve for x
   x = 1,448,287.03/1,389.22
6. Step 6: Final answer
   x = 1,042.52