Finding the Fourth Proportional to 1,042.43, 1,563.46 and 311.83

Step by Step Solution

1. Step 1: Write the proportion equation
   1,042.43 : 1,563.46 = 311.83 : x
2. Step 2: Convert to fraction form
   1,042.43/1,563.46 = 311.83/x
3. Step 3: Cross multiply
   1,042.43x = 1,563.46 × 311.83
4. Step 4: Simplify right side
   1,042.43x = 487,529.04
5. Step 5: Solve for x
   x = 487,529.04/1,042.43
6. Step 6: Final answer
   x = 467.69