Finding the Fourth Proportional to 1,502.39, 2,073.31 and 839.25

Step by Step Solution

1. Step 1: Write the proportion equation
   1,502.39 : 2,073.31 = 839.25 : x
2. Step 2: Convert to fraction form
   1,502.39/2,073.31 = 839.25/x
3. Step 3: Cross multiply
   1,502.39x = 2,073.31 × 839.25
4. Step 4: Simplify right side
   1,502.39x = 1,740,010.85
5. Step 5: Solve for x
   x = 1,740,010.85/1,502.39
6. Step 6: Final answer
   x = 1,158.16