Finding the Third Proportional to 2,490 and 3,540

Step by Step Solution

1. Step 1: Write the proportion equation
   2,490 : 3,540 = 3,540 : x
2. Step 2: Convert to fraction form
   2,490/3,540 = 3,540/x
3. Step 3: Cross multiply
   2,490x = 3,540 × 3,540
4. Step 4: Simplify right side
   2,490x = 12,531,600
5. Step 5: Solve for x
   x = 12,531,600/2,490
6. Step 6: Final answer
   x = 5,032.77