Finding the Third Proportional to 108,872 and 168,240

Step by Step Solution

1. Step 1: Write the proportion equation
   108,872 : 168,240 = 168,240 : x
2. Step 2: Convert to fraction form
   108,872/168,240 = 168,240/x
3. Step 3: Cross multiply
   108,872x = 168,240 × 168,240
4. Step 4: Simplify right side
   108,872x = 28,304,697,600
5. Step 5: Solve for x
   x = 28,304,697,600/108,872
6. Step 6: Final answer
   x = 259,981.42