Finding the Third Proportional to 31,223 and 67,988

Step by Step Solution

1. Step 1: Write the proportion equation
   31,223 : 67,988 = 67,988 : x
2. Step 2: Convert to fraction form
   31,223/67,988 = 67,988/x
3. Step 3: Cross multiply
   31,223x = 67,988 × 67,988
4. Step 4: Simplify right side
   31,223x = 4,622,368,144
5. Step 5: Solve for x
   x = 4,622,368,144/31,223
6. Step 6: Final answer
   x = 148,043.69