Finding the Third Proportional to 31,945 and 67,200

Step by Step Solution

1. Step 1: Write the proportion equation
   31,945 : 67,200 = 67,200 : x
2. Step 2: Convert to fraction form
   31,945/67,200 = 67,200/x
3. Step 3: Cross multiply
   31,945x = 67,200 × 67,200
4. Step 4: Simplify right side
   31,945x = 4,515,840,000
5. Step 5: Solve for x
   x = 4,515,840,000/31,945
6. Step 6: Final answer
   x = 141,362.97