Finding the Fourth Proportional to 2,243.30, 3,364.83 and 857.27

Step by Step Solution

1. Step 1: Write the proportion equation
   2,243.30 : 3,364.83 = 857.27 : x
2. Step 2: Convert to fraction form
   2,243.30/3,364.83 = 857.27/x
3. Step 3: Cross multiply
   2,243.30x = 3,364.83 × 857.27
4. Step 4: Simplify right side
   2,243.30x = 2,884,576.23
5. Step 5: Solve for x
   x = 2,884,576.23/2,243.30
6. Step 6: Final answer
   x = 1,285.87