Finding the Fourth Proportional to 1,419.23, 1,958.46 and 789.68

Step by Step Solution

1. Step 1: Write the proportion equation
   1,419.23 : 1,958.46 = 789.68 : x
2. Step 2: Convert to fraction form
   1,419.23/1,958.46 = 789.68/x
3. Step 3: Cross multiply
   1,419.23x = 1,958.46 × 789.68
4. Step 4: Simplify right side
   1,419.23x = 1,546,556.69
5. Step 5: Solve for x
   x = 1,546,556.69/1,419.23
6. Step 6: Final answer
   x = 1,089.72