Finding the Fourth Proportional to 1,103.58, 1,522.98 and 631.55

Step by Step Solution

1. Step 1: Write the proportion equation
   1,103.58 : 1,522.98 = 631.55 : x
2. Step 2: Convert to fraction form
   1,103.58/1,522.98 = 631.55/x
3. Step 3: Cross multiply
   1,103.58x = 1,522.98 × 631.55
4. Step 4: Simplify right side
   1,103.58x = 961,830.40
5. Step 5: Solve for x
   x = 961,830.40/1,103.58
6. Step 6: Final answer
   x = 871.55