Finding the Third Proportional to 300,942 and 647,244

Step by Step Solution

1. Step 1: Write the proportion equation
   300,942 : 647,244 = 647,244 : x
2. Step 2: Convert to fraction form
   300,942/647,244 = 647,244/x
3. Step 3: Cross multiply
   300,942x = 647,244 × 647,244
4. Step 4: Simplify right side
   300,942x = 418,924,795,536
5. Step 5: Solve for x
   x = 418,924,795,536/300,942
6. Step 6: Final answer
   x = 1,392,044.96