Finding the Third Proportional to 67,278 and 142,756

Step by Step Solution

1. Step 1: Write the proportion equation
   67,278 : 142,756 = 142,756 : x
2. Step 2: Convert to fraction form
   67,278/142,756 = 142,756/x
3. Step 3: Cross multiply
   67,278x = 142,756 × 142,756
4. Step 4: Simplify right side
   67,278x = 20,379,275,536
5. Step 5: Solve for x
   x = 20,379,275,536/67,278
6. Step 6: Final answer
   x = 302,911.44