Finding the Fourth Proportional to 1,103.70, 1,522.83 and 631.47

Step by Step Solution

1. Step 1: Write the proportion equation
   1,103.70 : 1,522.83 = 631.47 : x
2. Step 2: Convert to fraction form
   1,103.70/1,522.83 = 631.47/x
3. Step 3: Cross multiply
   1,103.70x = 1,522.83 × 631.47
4. Step 4: Simplify right side
   1,103.70x = 961,621.46
5. Step 5: Solve for x
   x = 961,621.46/1,103.70
6. Step 6: Final answer
   x = 871.27