Finding the Third Proportional to 1,392 and 1,540

Step by Step Solution

1. Step 1: Write the proportion equation
   1,392 : 1,540 = 1,540 : x
2. Step 2: Convert to fraction form
   1,392/1,540 = 1,540/x
3. Step 3: Cross multiply
   1,392x = 1,540 × 1,540
4. Step 4: Simplify right side
   1,392x = 2,371,600
5. Step 5: Solve for x
   x = 2,371,600/1,392
6. Step 6: Final answer
   x = 1,703.74