Finding the Fourth Proportional to 1,348.68, 1,861.32 and 789.10

Step by Step Solution

1. Step 1: Write the proportion equation
   1,348.68 : 1,861.32 = 789.10 : x
2. Step 2: Convert to fraction form
   1,348.68/1,861.32 = 789.10/x
3. Step 3: Cross multiply
   1,348.68x = 1,861.32 × 789.10
4. Step 4: Simplify right side
   1,348.68x = 1,468,767.61
5. Step 5: Solve for x
   x = 1,468,767.61/1,348.68
6. Step 6: Final answer
   x = 1,089.04