Finding the Third Proportional to 31,291 and 64,799

Step by Step Solution

1. Step 1: Write the proportion equation
   31,291 : 64,799 = 64,799 : x
2. Step 2: Convert to fraction form
   31,291/64,799 = 64,799/x
3. Step 3: Cross multiply
   31,291x = 64,799 × 64,799
4. Step 4: Simplify right side
   31,291x = 4,198,910,401
5. Step 5: Solve for x
   x = 4,198,910,401/31,291
6. Step 6: Final answer
   x = 134,189.08