Finding the Fourth Proportional to 2,631.53, 3,631.37 and 1,636.78

Step by Step Solution

1. Step 1: Write the proportion equation
   2,631.53 : 3,631.37 = 1,636.78 : x
2. Step 2: Convert to fraction form
   2,631.53/3,631.37 = 1,636.78/x
3. Step 3: Cross multiply
   2,631.53x = 3,631.37 × 1,636.78
4. Step 4: Simplify right side
   2,631.53x = 5,943,753.79
5. Step 5: Solve for x
   x = 5,943,753.79/2,631.53
6. Step 6: Final answer
   x = 2,258.67