Finding the Fourth Proportional to 2,086.88, 3,131.13 and 789.26

Step by Step Solution

1. Step 1: Write the proportion equation
   2,086.88 : 3,131.13 = 789.26 : x
2. Step 2: Convert to fraction form
   2,086.88/3,131.13 = 789.26/x
3. Step 3: Cross multiply
   2,086.88x = 3,131.13 × 789.26
4. Step 4: Simplify right side
   2,086.88x = 2,471,260.01
5. Step 5: Solve for x
   x = 2,471,260.01/2,086.88
6. Step 6: Final answer
   x = 1,184.19