Finding the Third Proportional to 30,917 and 67,315

Step by Step Solution

1. Step 1: Write the proportion equation
   30,917 : 67,315 = 67,315 : x
2. Step 2: Convert to fraction form
   30,917/67,315 = 67,315/x
3. Step 3: Cross multiply
   30,917x = 67,315 × 67,315
4. Step 4: Simplify right side
   30,917x = 4,531,309,225
5. Step 5: Solve for x
   x = 4,531,309,225/30,917
6. Step 6: Final answer
   x = 146,563.68