Finding the Fourth Proportional to 2,270.28, 3,404.55 and 789.12

Step by Step Solution

1. Step 1: Write the proportion equation
   2,270.28 : 3,404.55 = 789.12 : x
2. Step 2: Convert to fraction form
   2,270.28/3,404.55 = 789.12/x
3. Step 3: Cross multiply
   2,270.28x = 3,404.55 × 789.12
4. Step 4: Simplify right side
   2,270.28x = 2,686,598.50
5. Step 5: Solve for x
   x = 2,686,598.50/2,270.28
6. Step 6: Final answer
   x = 1,183.38