Finding the Third Proportional to 296,890 and 647,061

Step by Step Solution

1. Step 1: Write the proportion equation
   296,890 : 647,061 = 647,061 : x
2. Step 2: Convert to fraction form
   296,890/647,061 = 647,061/x
3. Step 3: Cross multiply
   296,890x = 647,061 × 647,061
4. Step 4: Simplify right side
   296,890x = 418,687,937,721
5. Step 5: Solve for x
   x = 418,687,937,721/296,890
6. Step 6: Final answer
   x = 1,410,246.01