Finding the Fourth Proportional to 1,082.52, 1,620.73 and 839.52

Step by Step Solution

1. Step 1: Write the proportion equation
   1,082.52 : 1,620.73 = 839.52 : x
2. Step 2: Convert to fraction form
   1,082.52/1,620.73 = 839.52/x
3. Step 3: Cross multiply
   1,082.52x = 1,620.73 × 839.52
4. Step 4: Simplify right side
   1,082.52x = 1,360,635.25
5. Step 5: Solve for x
   x = 1,360,635.25/1,082.52
6. Step 6: Final answer
   x = 1,256.91