Finding the Fourth Proportional to 1,638.58, 2,453.04 and 1,082.27

Step by Step Solution

1. Step 1: Write the proportion equation
   1,638.58 : 2,453.04 = 1,082.27 : x
2. Step 2: Convert to fraction form
   1,638.58/2,453.04 = 1,082.27/x
3. Step 3: Cross multiply
   1,638.58x = 2,453.04 × 1,082.27
4. Step 4: Simplify right side
   1,638.58x = 2,654,833.92
5. Step 5: Solve for x
   x = 2,654,833.92/1,638.58
6. Step 6: Final answer
   x = 1,620.21