Finding the Fourth Proportional to 2,638.18, 3,638.28 and 2,265.04

Step by Step Solution

1. Step 1: Write the proportion equation
   2,638.18 : 3,638.28 = 2,265.04 : x
2. Step 2: Convert to fraction form
   2,638.18/3,638.28 = 2,265.04/x
3. Step 3: Cross multiply
   2,638.18x = 3,638.28 × 2,265.04
4. Step 4: Simplify right side
   2,638.18x = 8,240,849.73
5. Step 5: Solve for x
   x = 8,240,849.73/2,638.18
6. Step 6: Final answer
   x = 3,123.69