Finding the Fourth Proportional to 1,016.63, 1,401.22 and 717.94

Step by Step Solution

1. Step 1: Write the proportion equation
   1,016.63 : 1,401.22 = 717.94 : x
2. Step 2: Convert to fraction form
   1,016.63/1,401.22 = 717.94/x
3. Step 3: Cross multiply
   1,016.63x = 1,401.22 × 717.94
4. Step 4: Simplify right side
   1,016.63x = 1,005,991.89
5. Step 5: Solve for x
   x = 1,005,991.89/1,016.63
6. Step 6: Final answer
   x = 989.54