Finding the Fourth Proportional to 1,631.60, 2,251.56 and 885.52

Step by Step Solution

1. Step 1: Write the proportion equation
   1,631.60 : 2,251.56 = 885.52 : x
2. Step 2: Convert to fraction form
   1,631.60/2,251.56 = 885.52/x
3. Step 3: Cross multiply
   1,631.60x = 2,251.56 × 885.52
4. Step 4: Simplify right side
   1,631.60x = 1,993,801.41
5. Step 5: Solve for x
   x = 1,993,801.41/1,631.60
6. Step 6: Final answer
   x = 1,221.99