Finding the Fourth Proportional to 2,162.05, 3,243.09 and 928.42

Step by Step Solution

1. Step 1: Write the proportion equation
   2,162.05 : 3,243.09 = 928.42 : x
2. Step 2: Convert to fraction form
   2,162.05/3,243.09 = 928.42/x
3. Step 3: Cross multiply
   2,162.05x = 3,243.09 × 928.42
4. Step 4: Simplify right side
   2,162.05x = 3,010,949.62
5. Step 5: Solve for x
   x = 3,010,949.62/2,162.05
6. Step 6: Final answer
   x = 1,392.64