Finding the Fourth Proportional to 2,086.70, 3,131.50 and 789.26

Step by Step Solution

1. Step 1: Write the proportion equation
   2,086.70 : 3,131.50 = 789.26 : x
2. Step 2: Convert to fraction form
   2,086.70/3,131.50 = 789.26/x
3. Step 3: Cross multiply
   2,086.70x = 3,131.50 × 789.26
4. Step 4: Simplify right side
   2,086.70x = 2,471,567.69
5. Step 5: Solve for x
   x = 2,471,567.69/2,086.70
6. Step 6: Final answer
   x = 1,184.44