Finding the Third Proportional to 31,359 and 67,089

Step by Step Solution

1. Step 1: Write the proportion equation
   31,359 : 67,089 = 67,089 : x
2. Step 2: Convert to fraction form
   31,359/67,089 = 67,089/x
3. Step 3: Cross multiply
   31,359x = 67,089 × 67,089
4. Step 4: Simplify right side
   31,359x = 4,500,933,921
5. Step 5: Solve for x
   x = 4,500,933,921/31,359
6. Step 6: Final answer
   x = 143,529.26