Finding the Third Proportional to 21,612 and 29,040

Step by Step Solution

1. Step 1: Write the proportion equation
   21,612 : 29,040 = 29,040 : x
2. Step 2: Convert to fraction form
   21,612/29,040 = 29,040/x
3. Step 3: Cross multiply
   21,612x = 29,040 × 29,040
4. Step 4: Simplify right side
   21,612x = 843,321,600
5. Step 5: Solve for x
   x = 843,321,600/21,612
6. Step 6: Final answer
   x = 39,020.99