Finding the Fourth Proportional to 1,223.71, 1,833.51 and 789.94

Step by Step Solution

1. Step 1: Write the proportion equation
   1,223.71 : 1,833.51 = 789.94 : x
2. Step 2: Convert to fraction form
   1,223.71/1,833.51 = 789.94/x
3. Step 3: Cross multiply
   1,223.71x = 1,833.51 × 789.94
4. Step 4: Simplify right side
   1,223.71x = 1,448,362.89
5. Step 5: Solve for x
   x = 1,448,362.89/1,223.71
6. Step 6: Final answer
   x = 1,183.58