Finding the Fourth Proportional to 1,408.27, 1,943.58 and 818.68

Step by Step Solution

1. Step 1: Write the proportion equation
   1,408.27 : 1,943.58 = 818.68 : x
2. Step 2: Convert to fraction form
   1,408.27/1,943.58 = 818.68/x
3. Step 3: Cross multiply
   1,408.27x = 1,943.58 × 818.68
4. Step 4: Simplify right side
   1,408.27x = 1,591,170.07
5. Step 5: Solve for x
   x = 1,591,170.07/1,408.27
6. Step 6: Final answer
   x = 1,129.88