Finding the Fourth Proportional to 1,419.33, 1,958.59 and 789.83

Step by Step Solution

1. Step 1: Write the proportion equation
   1,419.33 : 1,958.59 = 789.83 : x
2. Step 2: Convert to fraction form
   1,419.33/1,958.59 = 789.83/x
3. Step 3: Cross multiply
   1,419.33x = 1,958.59 × 789.83
4. Step 4: Simplify right side
   1,419.33x = 1,546,951.68
5. Step 5: Solve for x
   x = 1,546,951.68/1,419.33
6. Step 6: Final answer
   x = 1,089.91