Finding the Third Proportional to 31,840 and 67,912

Step by Step Solution

1. Step 1: Write the proportion equation
   31,840 : 67,912 = 67,912 : x
2. Step 2: Convert to fraction form
   31,840/67,912 = 67,912/x
3. Step 3: Cross multiply
   31,840x = 67,912 × 67,912
4. Step 4: Simplify right side
   31,840x = 4,612,039,744
5. Step 5: Solve for x
   x = 4,612,039,744/31,840
6. Step 6: Final answer
   x = 144,850.49