Finding the Third Proportional to 143,728 and 296,676

Step by Step Solution

1. Step 1: Write the proportion equation
   143,728 : 296,676 = 296,676 : x
2. Step 2: Convert to fraction form
   143,728/296,676 = 296,676/x
3. Step 3: Cross multiply
   143,728x = 296,676 × 296,676
4. Step 4: Simplify right side
   143,728x = 88,016,648,976
5. Step 5: Solve for x
   x = 88,016,648,976/143,728
6. Step 6: Final answer
   x = 612,383.45