Finding the Third Proportional to 31,789 and 67,799

Step by Step Solution

1. Step 1: Write the proportion equation
   31,789 : 67,799 = 67,799 : x
2. Step 2: Convert to fraction form
   31,789/67,799 = 67,799/x
3. Step 3: Cross multiply
   31,789x = 67,799 × 67,799
4. Step 4: Simplify right side
   31,789x = 4,596,704,401
5. Step 5: Solve for x
   x = 4,596,704,401/31,789
6. Step 6: Final answer
   x = 144,600.47