Finding the Fourth Proportional to 1,016.72, 1,522.44 and 871.40

Step by Step Solution

1. Step 1: Write the proportion equation
   1,016.72 : 1,522.44 = 871.40 : x
2. Step 2: Convert to fraction form
   1,016.72/1,522.44 = 871.40/x
3. Step 3: Cross multiply
   1,016.72x = 1,522.44 × 871.40
4. Step 4: Simplify right side
   1,016.72x = 1,326,658.02
5. Step 5: Solve for x
   x = 1,326,658.02/1,016.72
6. Step 6: Final answer
   x = 1,304.84