Finding the Fourth Proportional to 3,638.57, 5,020.92 and 2,146.55

Step by Step Solution

1. Step 1: Write the proportion equation
   3,638.57 : 5,020.92 = 2,146.55 : x
2. Step 2: Convert to fraction form
   3,638.57/5,020.92 = 2,146.55/x
3. Step 3: Cross multiply
   3,638.57x = 5,020.92 × 2,146.55
4. Step 4: Simplify right side
   3,638.57x = 10,777,630.72
5. Step 5: Solve for x
   x = 10,777,630.72/3,638.57
6. Step 6: Final answer
   x = 2,962.06