Finding the Fourth Proportional to 1,231.28, 1,844.18 and 743.31

Step by Step Solution

1. Step 1: Write the proportion equation
   1,231.28 : 1,844.18 = 743.31 : x
2. Step 2: Convert to fraction form
   1,231.28/1,844.18 = 743.31/x
3. Step 3: Cross multiply
   1,231.28x = 1,844.18 × 743.31
4. Step 4: Simplify right side
   1,231.28x = 1,370,793.72
5. Step 5: Solve for x
   x = 1,370,793.72/1,231.28
6. Step 6: Final answer
   x = 1,113.31