Finding the Fourth Proportional to 2,087.80, 3,132.24 and 789.28

Step by Step Solution

1. Step 1: Write the proportion equation
   2,087.80 : 3,132.24 = 789.28 : x
2. Step 2: Convert to fraction form
   2,087.80/3,132.24 = 789.28/x
3. Step 3: Cross multiply
   2,087.80x = 3,132.24 × 789.28
4. Step 4: Simplify right side
   2,087.80x = 2,472,214.39
5. Step 5: Solve for x
   x = 2,472,214.39/2,087.80
6. Step 6: Final answer
   x = 1,184.12