Finding the Third Proportional to 31,998 and 68,388

Step by Step Solution

1. Step 1: Write the proportion equation
   31,998 : 68,388 = 68,388 : x
2. Step 2: Convert to fraction form
   31,998/68,388 = 68,388/x
3. Step 3: Cross multiply
   31,998x = 68,388 × 68,388
4. Step 4: Simplify right side
   31,998x = 4,676,918,544
5. Step 5: Solve for x
   x = 4,676,918,544/31,998
6. Step 6: Final answer
   x = 146,162.84