Finding the Third Proportional to 30,656 and 67,200

Step by Step Solution

1. Step 1: Write the proportion equation
   30,656 : 67,200 = 67,200 : x
2. Step 2: Convert to fraction form
   30,656/67,200 = 67,200/x
3. Step 3: Cross multiply
   30,656x = 67,200 × 67,200
4. Step 4: Simplify right side
   30,656x = 4,515,840,000
5. Step 5: Solve for x
   x = 4,515,840,000/30,656
6. Step 6: Final answer
   x = 147,306.89