Finding the Fourth Proportional to 1,016.97, 1,401.41 and 721.73

Step by Step Solution

1. Step 1: Write the proportion equation
   1,016.97 : 1,401.41 = 721.73 : x
2. Step 2: Convert to fraction form
   1,016.97/1,401.41 = 721.73/x
3. Step 3: Cross multiply
   1,016.97x = 1,401.41 × 721.73
4. Step 4: Simplify right side
   1,016.97x = 1,011,429.02
5. Step 5: Solve for x
   x = 1,011,429.02/1,016.97
6. Step 6: Final answer
   x = 994.55