Finding the Fourth Proportional to 1,229.87, 1,843.61 and 789.89

Step by Step Solution

1. Step 1: Write the proportion equation
   1,229.87 : 1,843.61 = 789.89 : x
2. Step 2: Convert to fraction form
   1,229.87/1,843.61 = 789.89/x
3. Step 3: Cross multiply
   1,229.87x = 1,843.61 × 789.89
4. Step 4: Simplify right side
   1,229.87x = 1,456,249.10
5. Step 5: Solve for x
   x = 1,456,249.10/1,229.87
6. Step 6: Final answer
   x = 1,184.07