Finding the Fourth Proportional to 1,483.31, 2,223.75 and 789.55

Step by Step Solution

1. Step 1: Write the proportion equation
   1,483.31 : 2,223.75 = 789.55 : x
2. Step 2: Convert to fraction form
   1,483.31/2,223.75 = 789.55/x
3. Step 3: Cross multiply
   1,483.31x = 2,223.75 × 789.55
4. Step 4: Simplify right side
   1,483.31x = 1,755,759.21
5. Step 5: Solve for x
   x = 1,755,759.21/1,483.31
6. Step 6: Final answer
   x = 1,183.67