Finding the Fourth Proportional to 1,418.81, 1,957.81 and 789.29

Step by Step Solution

1. Step 1: Write the proportion equation
   1,418.81 : 1,957.81 = 789.29 : x
2. Step 2: Convert to fraction form
   1,418.81/1,957.81 = 789.29/x
3. Step 3: Cross multiply
   1,418.81x = 1,957.81 × 789.29
4. Step 4: Simplify right side
   1,418.81x = 1,545,279.85
5. Step 5: Solve for x
   x = 1,545,279.85/1,418.81
6. Step 6: Final answer
   x = 1,089.14