Finding the Third Proportional to 67,858 and 143,372

Step by Step Solution

1. Step 1: Write the proportion equation
   67,858 : 143,372 = 143,372 : x
2. Step 2: Convert to fraction form
   67,858/143,372 = 143,372/x
3. Step 3: Cross multiply
   67,858x = 143,372 × 143,372
4. Step 4: Simplify right side
   67,858x = 20,555,530,384
5. Step 5: Solve for x
   x = 20,555,530,384/67,858
6. Step 6: Final answer
   x = 302,919.78