Finding the Fourth Proportional to 1,418.59, 1,957.71 and 789.11

Step by Step Solution

1. Step 1: Write the proportion equation
   1,418.59 : 1,957.71 = 789.11 : x
2. Step 2: Convert to fraction form
   1,418.59/1,957.71 = 789.11/x
3. Step 3: Cross multiply
   1,418.59x = 1,957.71 × 789.11
4. Step 4: Simplify right side
   1,418.59x = 1,544,853.43
5. Step 5: Solve for x
   x = 1,544,853.43/1,418.59
6. Step 6: Final answer
   x = 1,089.01