Finding the Third Proportional to 426,191 and 647,063

Step by Step Solution

1. Step 1: Write the proportion equation
   426,191 : 647,063 = 647,063 : x
2. Step 2: Convert to fraction form
   426,191/647,063 = 647,063/x
3. Step 3: Cross multiply
   426,191x = 647,063 × 647,063
4. Step 4: Simplify right side
   426,191x = 418,690,525,969
5. Step 5: Solve for x
   x = 418,690,525,969/426,191
6. Step 6: Final answer
   x = 982,401.14