Finding the Third Proportional to 31,170 and 67,260

Step by Step Solution

1. Step 1: Write the proportion equation
   31,170 : 67,260 = 67,260 : x
2. Step 2: Convert to fraction form
   31,170/67,260 = 67,260/x
3. Step 3: Cross multiply
   31,170x = 67,260 × 67,260
4. Step 4: Simplify right side
   31,170x = 4,523,907,600
5. Step 5: Solve for x
   x = 4,523,907,600/31,170
6. Step 6: Final answer
   x = 145,136.59