Finding the Third Proportional to 13,910 and 21,540

Step by Step Solution

1. Step 1: Write the proportion equation
   13,910 : 21,540 = 21,540 : x
2. Step 2: Convert to fraction form
   13,910/21,540 = 21,540/x
3. Step 3: Cross multiply
   13,910x = 21,540 × 21,540
4. Step 4: Simplify right side
   13,910x = 463,971,600
5. Step 5: Solve for x
   x = 463,971,600/13,910
6. Step 6: Final answer
   x = 33,355.26