Finding the Fourth Proportional to 1,155.33, 1,731.06 and 789.39

Step by Step Solution

1. Step 1: Write the proportion equation
   1,155.33 : 1,731.06 = 789.39 : x
2. Step 2: Convert to fraction form
   1,155.33/1,731.06 = 789.39/x
3. Step 3: Cross multiply
   1,155.33x = 1,731.06 × 789.39
4. Step 4: Simplify right side
   1,155.33x = 1,366,481.45
5. Step 5: Solve for x
   x = 1,366,481.45/1,155.33
6. Step 6: Final answer
   x = 1,182.76