Finding the Fourth Proportional to 1,016.28, 1,401.30 and 817.02

Step by Step Solution

1. Step 1: Write the proportion equation
   1,016.28 : 1,401.30 = 817.02 : x
2. Step 2: Convert to fraction form
   1,016.28/1,401.30 = 817.02/x
3. Step 3: Cross multiply
   1,016.28x = 1,401.30 × 817.02
4. Step 4: Simplify right side
   1,016.28x = 1,144,890.13
5. Step 5: Solve for x
   x = 1,144,890.13/1,016.28
6. Step 6: Final answer
   x = 1,126.55