Finding the Third Proportional to 30,888 and 67,320

Step by Step Solution

1. Step 1: Write the proportion equation
   30,888 : 67,320 = 67,320 : x
2. Step 2: Convert to fraction form
   30,888/67,320 = 67,320/x
3. Step 3: Cross multiply
   30,888x = 67,320 × 67,320
4. Step 4: Simplify right side
   30,888x = 4,531,982,400
5. Step 5: Solve for x
   x = 4,531,982,400/30,888
6. Step 6: Final answer
   x = 146,723.08