Finding the Fourth Proportional to 1,418.72, 1,957.84 and 789.26

Step by Step Solution

1. Step 1: Write the proportion equation
   1,418.72 : 1,957.84 = 789.26 : x
2. Step 2: Convert to fraction form
   1,418.72/1,957.84 = 789.26/x
3. Step 3: Cross multiply
   1,418.72x = 1,957.84 × 789.26
4. Step 4: Simplify right side
   1,418.72x = 1,545,233.04
5. Step 5: Solve for x
   x = 1,545,233.04/1,418.72
6. Step 6: Final answer
   x = 1,089.18