Finding the Fourth Proportional to 1,073.39, 1,481.46 and 631.31

Step by Step Solution

1. Step 1: Write the proportion equation
   1,073.39 : 1,481.46 = 631.31 : x
2. Step 2: Convert to fraction form
   1,073.39/1,481.46 = 631.31/x
3. Step 3: Cross multiply
   1,073.39x = 1,481.46 × 631.31
4. Step 4: Simplify right side
   1,073.39x = 935,250.74
5. Step 5: Solve for x
   x = 935,250.74/1,073.39
6. Step 6: Final answer
   x = 871.31