Finding the Third Proportional to 31,716 and 67,824

Step by Step Solution

1. Step 1: Write the proportion equation
   31,716 : 67,824 = 67,824 : x
2. Step 2: Convert to fraction form
   31,716/67,824 = 67,824/x
3. Step 3: Cross multiply
   31,716x = 67,824 × 67,824
4. Step 4: Simplify right side
   31,716x = 4,600,094,976
5. Step 5: Solve for x
   x = 4,600,094,976/31,716
6. Step 6: Final answer
   x = 145,040.20