Finding the Third Proportional to 31,988 and 67,667

Step by Step Solution

1. Step 1: Write the proportion equation
   31,988 : 67,667 = 67,667 : x
2. Step 2: Convert to fraction form
   31,988/67,667 = 67,667/x
3. Step 3: Cross multiply
   31,988x = 67,667 × 67,667
4. Step 4: Simplify right side
   31,988x = 4,578,822,889
5. Step 5: Solve for x
   x = 4,578,822,889/31,988
6. Step 6: Final answer
   x = 143,141.89