Finding the Third Proportional to 426,190 and 647,061

Step by Step Solution

1. Step 1: Write the proportion equation
   426,190 : 647,061 = 647,061 : x
2. Step 2: Convert to fraction form
   426,190/647,061 = 647,061/x
3. Step 3: Cross multiply
   426,190x = 647,061 × 647,061
4. Step 4: Simplify right side
   426,190x = 418,687,937,721
5. Step 5: Solve for x
   x = 418,687,937,721/426,190
6. Step 6: Final answer
   x = 982,397.38