Finding the Fourth Proportional to 1,103.49, 1,522.73 and 631.23

Step by Step Solution

1. Step 1: Write the proportion equation
   1,103.49 : 1,522.73 = 631.23 : x
2. Step 2: Convert to fraction form
   1,103.49/1,522.73 = 631.23/x
3. Step 3: Cross multiply
   1,103.49x = 1,522.73 × 631.23
4. Step 4: Simplify right side
   1,103.49x = 961,189.70
5. Step 5: Solve for x
   x = 961,189.70/1,103.49
6. Step 6: Final answer
   x = 871.05