Finding the Fourth Proportional to 1,631.46, 2,251.42 and 885.42

Step by Step Solution

1. Step 1: Write the proportion equation
   1,631.46 : 2,251.42 = 885.42 : x
2. Step 2: Convert to fraction form
   1,631.46/2,251.42 = 885.42/x
3. Step 3: Cross multiply
   1,631.46x = 2,251.42 × 885.42
4. Step 4: Simplify right side
   1,631.46x = 1,993,452.30
5. Step 5: Solve for x
   x = 1,993,452.30/1,631.46
6. Step 6: Final answer
   x = 1,221.88