Finding the Fourth Proportional to 1,452.78, 2,004.82 and 789.63

Step by Step Solution

1. Step 1: Write the proportion equation
   1,452.78 : 2,004.82 = 789.63 : x
2. Step 2: Convert to fraction form
   1,452.78/2,004.82 = 789.63/x
3. Step 3: Cross multiply
   1,452.78x = 2,004.82 × 789.63
4. Step 4: Simplify right side
   1,452.78x = 1,583,066.02
5. Step 5: Solve for x
   x = 1,583,066.02/1,452.78
6. Step 6: Final answer
   x = 1,089.68