Finding the Third Proportional to 31,329 and 67,212

Step by Step Solution

1. Step 1: Write the proportion equation
   31,329 : 67,212 = 67,212 : x
2. Step 2: Convert to fraction form
   31,329/67,212 = 67,212/x
3. Step 3: Cross multiply
   31,329x = 67,212 × 67,212
4. Step 4: Simplify right side
   31,329x = 4,517,452,944
5. Step 5: Solve for x
   x = 4,517,452,944/31,329
6. Step 6: Final answer
   x = 144,193.97