Finding the Third Proportional to 647,704 and 905,736

Step by Step Solution

1. Step 1: Write the proportion equation
   647,704 : 905,736 = 905,736 : x
2. Step 2: Convert to fraction form
   647,704/905,736 = 905,736/x
3. Step 3: Cross multiply
   647,704x = 905,736 × 905,736
4. Step 4: Simplify right side
   647,704x = 820,357,701,696
5. Step 5: Solve for x
   x = 820,357,701,696/647,704
6. Step 6: Final answer
   x = 1,266,562.66