Finding the Fourth Proportional to 1,348.55, 1,861.18 and 789.14

Step by Step Solution

1. Step 1: Write the proportion equation
   1,348.55 : 1,861.18 = 789.14 : x
2. Step 2: Convert to fraction form
   1,348.55/1,861.18 = 789.14/x
3. Step 3: Cross multiply
   1,348.55x = 1,861.18 × 789.14
4. Step 4: Simplify right side
   1,348.55x = 1,468,734.27
5. Step 5: Solve for x
   x = 1,468,734.27/1,348.55
6. Step 6: Final answer
   x = 1,089.12