Finding the Third Proportional to 2,722 and 3,890

Step by Step Solution

1. Step 1: Write the proportion equation
   2,722 : 3,890 = 3,890 : x
2. Step 2: Convert to fraction form
   2,722/3,890 = 3,890/x
3. Step 3: Cross multiply
   2,722x = 3,890 × 3,890
4. Step 4: Simplify right side
   2,722x = 15,132,100
5. Step 5: Solve for x
   x = 15,132,100/2,722
6. Step 6: Final answer
   x = 5,559.18