Finding the Fourth Proportional to 1,294.43, 1,785.57 and 789.89

Step by Step Solution

1. Step 1: Write the proportion equation
   1,294.43 : 1,785.57 = 789.89 : x
2. Step 2: Convert to fraction form
   1,294.43/1,785.57 = 789.89/x
3. Step 3: Cross multiply
   1,294.43x = 1,785.57 × 789.89
4. Step 4: Simplify right side
   1,294.43x = 1,410,403.89
5. Step 5: Solve for x
   x = 1,410,403.89/1,294.43
6. Step 6: Final answer
   x = 1,089.59