Finding the Fourth Proportional to 1,419.07, 1,958.28 and 789.59

Step by Step Solution

1. Step 1: Write the proportion equation
   1,419.07 : 1,958.28 = 789.59 : x
2. Step 2: Convert to fraction form
   1,419.07/1,958.28 = 789.59/x
3. Step 3: Cross multiply
   1,419.07x = 1,958.28 × 789.59
4. Step 4: Simplify right side
   1,419.07x = 1,546,238.31
5. Step 5: Solve for x
   x = 1,546,238.31/1,419.07
6. Step 6: Final answer
   x = 1,089.61