Finding the Fourth Proportional to 1,016.02, 1,401.06 and 869.14

Step by Step Solution

1. Step 1: Write the proportion equation
   1,016.02 : 1,401.06 = 869.14 : x
2. Step 2: Convert to fraction form
   1,016.02/1,401.06 = 869.14/x
3. Step 3: Cross multiply
   1,016.02x = 1,401.06 × 869.14
4. Step 4: Simplify right side
   1,016.02x = 1,217,717.29
5. Step 5: Solve for x
   x = 1,217,717.29/1,016.02
6. Step 6: Final answer
   x = 1,198.52