Finding the Third Proportional to 69,168 and 140,872

Step by Step Solution

1. Step 1: Write the proportion equation
   69,168 : 140,872 = 140,872 : x
2. Step 2: Convert to fraction form
   69,168/140,872 = 140,872/x
3. Step 3: Cross multiply
   69,168x = 140,872 × 140,872
4. Step 4: Simplify right side
   69,168x = 19,844,920,384
5. Step 5: Solve for x
   x = 19,844,920,384/69,168
6. Step 6: Final answer
   x = 286,908.98