Finding the Third Proportional to 21,040 and 29,256

Step by Step Solution

1. Step 1: Write the proportion equation
   21,040 : 29,256 = 29,256 : x
2. Step 2: Convert to fraction form
   21,040/29,256 = 29,256/x
3. Step 3: Cross multiply
   21,040x = 29,256 × 29,256
4. Step 4: Simplify right side
   21,040x = 855,913,536
5. Step 5: Solve for x
   x = 855,913,536/21,040
6. Step 6: Final answer
   x = 40,680.30