Finding the Third Proportional to 31,372 and 67,631

Step by Step Solution

1. Step 1: Write the proportion equation
   31,372 : 67,631 = 67,631 : x
2. Step 2: Convert to fraction form
   31,372/67,631 = 67,631/x
3. Step 3: Cross multiply
   31,372x = 67,631 × 67,631
4. Step 4: Simplify right side
   31,372x = 4,573,952,161
5. Step 5: Solve for x
   x = 4,573,952,161/31,372
6. Step 6: Final answer
   x = 145,797.28