Finding the Third Proportional to 111,988 and 173,418

Step by Step Solution

1. Step 1: Write the proportion equation
   111,988 : 173,418 = 173,418 : x
2. Step 2: Convert to fraction form
   111,988/173,418 = 173,418/x
3. Step 3: Cross multiply
   111,988x = 173,418 × 173,418
4. Step 4: Simplify right side
   111,988x = 30,073,802,724
5. Step 5: Solve for x
   x = 30,073,802,724/111,988
6. Step 6: Final answer
   x = 268,544.87