Finding the Fourth Proportional to 2,162.02, 3,243.54 and 928.78

Step by Step Solution

1. Step 1: Write the proportion equation
   2,162.02 : 3,243.54 = 928.78 : x
2. Step 2: Convert to fraction form
   2,162.02/3,243.54 = 928.78/x
3. Step 3: Cross multiply
   2,162.02x = 3,243.54 × 928.78
4. Step 4: Simplify right side
   2,162.02x = 3,012,535.08
5. Step 5: Solve for x
   x = 3,012,535.08/2,162.02
6. Step 6: Final answer
   x = 1,393.39