Finding the Third Proportional to 30,408 and 63,872

Step by Step Solution

1. Step 1: Write the proportion equation
   30,408 : 63,872 = 63,872 : x
2. Step 2: Convert to fraction form
   30,408/63,872 = 63,872/x
3. Step 3: Cross multiply
   30,408x = 63,872 × 63,872
4. Step 4: Simplify right side
   30,408x = 4,079,632,384
5. Step 5: Solve for x
   x = 4,079,632,384/30,408
6. Step 6: Final answer
   x = 134,163.13