Finding the Third Proportional to 20,401 and 42,867

Step by Step Solution

1. Step 1: Write the proportion equation
   20,401 : 42,867 = 42,867 : x
2. Step 2: Convert to fraction form
   20,401/42,867 = 42,867/x
3. Step 3: Cross multiply
   20,401x = 42,867 × 42,867
4. Step 4: Simplify right side
   20,401x = 1,837,579,689
5. Step 5: Solve for x
   x = 1,837,579,689/20,401
6. Step 6: Final answer
   x = 90,073.02