Finding the Third Proportional to 31,021 and 67,910

Step by Step Solution

1. Step 1: Write the proportion equation
   31,021 : 67,910 = 67,910 : x
2. Step 2: Convert to fraction form
   31,021/67,910 = 67,910/x
3. Step 3: Cross multiply
   31,021x = 67,910 × 67,910
4. Step 4: Simplify right side
   31,021x = 4,611,768,100
5. Step 5: Solve for x
   x = 4,611,768,100/31,021
6. Step 6: Final answer
   x = 148,666.00