Finding the Third Proportional to 31,991 and 67,673

Step by Step Solution

1. Step 1: Write the proportion equation
   31,991 : 67,673 = 67,673 : x
2. Step 2: Convert to fraction form
   31,991/67,673 = 67,673/x
3. Step 3: Cross multiply
   31,991x = 67,673 × 67,673
4. Step 4: Simplify right side
   31,991x = 4,579,634,929
5. Step 5: Solve for x
   x = 4,579,634,929/31,991
6. Step 6: Final answer
   x = 143,153.85