Finding the Fourth Proportional to 1,408.05, 1,942.79 and 818.24

Step by Step Solution

1. Step 1: Write the proportion equation
   1,408.05 : 1,942.79 = 818.24 : x
2. Step 2: Convert to fraction form
   1,408.05/1,942.79 = 818.24/x
3. Step 3: Cross multiply
   1,408.05x = 1,942.79 × 818.24
4. Step 4: Simplify right side
   1,408.05x = 1,589,654.68
5. Step 5: Solve for x
   x = 1,589,654.68/1,408.05
6. Step 6: Final answer
   x = 1,128.98