Finding the Third Proportional to 2,774 and 2,990

Step by Step Solution

1. Step 1: Write the proportion equation
   2,774 : 2,990 = 2,990 : x
2. Step 2: Convert to fraction form
   2,774/2,990 = 2,990/x
3. Step 3: Cross multiply
   2,774x = 2,990 × 2,990
4. Step 4: Simplify right side
   2,774x = 8,940,100
5. Step 5: Solve for x
   x = 8,940,100/2,774
6. Step 6: Final answer
   x = 3,222.82