Finding the Fourth Proportional to 2,638.02, 3,957.34 and 789.24

Step by Step Solution

1. Step 1: Write the proportion equation
   2,638.02 : 3,957.34 = 789.24 : x
2. Step 2: Convert to fraction form
   2,638.02/3,957.34 = 789.24/x
3. Step 3: Cross multiply
   2,638.02x = 3,957.34 × 789.24
4. Step 4: Simplify right side
   2,638.02x = 3,123,291.02
5. Step 5: Solve for x
   x = 3,123,291.02/2,638.02
6. Step 6: Final answer
   x = 1,183.95