Finding the Fourth Proportional to 1,418.55, 1,957.74 and 789.24

Step by Step Solution

1. Step 1: Write the proportion equation
   1,418.55 : 1,957.74 = 789.24 : x
2. Step 2: Convert to fraction form
   1,418.55/1,957.74 = 789.24/x
3. Step 3: Cross multiply
   1,418.55x = 1,957.74 × 789.24
4. Step 4: Simplify right side
   1,418.55x = 1,545,126.72
5. Step 5: Solve for x
   x = 1,545,126.72/1,418.55
6. Step 6: Final answer
   x = 1,089.23