Finding the Fourth Proportional to 1,348.91, 1,861.56 and 789.34

Step by Step Solution

1. Step 1: Write the proportion equation
   1,348.91 : 1,861.56 = 789.34 : x
2. Step 2: Convert to fraction form
   1,348.91/1,861.56 = 789.34/x
3. Step 3: Cross multiply
   1,348.91x = 1,861.56 × 789.34
4. Step 4: Simplify right side
   1,348.91x = 1,469,403.77
5. Step 5: Solve for x
   x = 1,469,403.77/1,348.91
6. Step 6: Final answer
   x = 1,089.33