Finding the Fourth Proportional to 1,418.95, 1,958.28 and 789.54

Step by Step Solution

1. Step 1: Write the proportion equation
   1,418.95 : 1,958.28 = 789.54 : x
2. Step 2: Convert to fraction form
   1,418.95/1,958.28 = 789.54/x
3. Step 3: Cross multiply
   1,418.95x = 1,958.28 × 789.54
4. Step 4: Simplify right side
   1,418.95x = 1,546,140.39
5. Step 5: Solve for x
   x = 1,546,140.39/1,418.95
6. Step 6: Final answer
   x = 1,089.64