Finding the Third Proportional to 31,446 and 67,790

Step by Step Solution

1. Step 1: Write the proportion equation
   31,446 : 67,790 = 67,790 : x
2. Step 2: Convert to fraction form
   31,446/67,790 = 67,790/x
3. Step 3: Cross multiply
   31,446x = 67,790 × 67,790
4. Step 4: Simplify right side
   31,446x = 4,595,484,100
5. Step 5: Solve for x
   x = 4,595,484,100/31,446
6. Step 6: Final answer
   x = 146,138.91