Finding the Fourth Proportional to 1,348.76, 1,861.56 and 789.52

Step by Step Solution

1. Step 1: Write the proportion equation
   1,348.76 : 1,861.56 = 789.52 : x
2. Step 2: Convert to fraction form
   1,348.76/1,861.56 = 789.52/x
3. Step 3: Cross multiply
   1,348.76x = 1,861.56 × 789.52
4. Step 4: Simplify right side
   1,348.76x = 1,469,734.20
5. Step 5: Solve for x
   x = 1,469,734.20/1,348.76
6. Step 6: Final answer
   x = 1,089.70