Finding the Third Proportional to 68,684 and 144,870

Step by Step Solution

1. Step 1: Write the proportion equation
   68,684 : 144,870 = 144,870 : x
2. Step 2: Convert to fraction form
   68,684/144,870 = 144,870/x
3. Step 3: Cross multiply
   68,684x = 144,870 × 144,870
4. Step 4: Simplify right side
   68,684x = 20,987,316,900
5. Step 5: Solve for x
   x = 20,987,316,900/68,684
6. Step 6: Final answer
   x = 305,563.40