Finding the Fourth Proportional to 2,243.86, 3,367.20 and 857.34

Step by Step Solution

1. Step 1: Write the proportion equation
   2,243.86 : 3,367.20 = 857.34 : x
2. Step 2: Convert to fraction form
   2,243.86/3,367.20 = 857.34/x
3. Step 3: Cross multiply
   2,243.86x = 3,367.20 × 857.34
4. Step 4: Simplify right side
   2,243.86x = 2,886,835.25
5. Step 5: Solve for x
   x = 2,886,835.25/2,243.86
6. Step 6: Final answer
   x = 1,286.55