Finding the Third Proportional to 717,648 and 1,691,698

Step by Step Solution

1. Step 1: Write the proportion equation
   717,648 : 1,691,698 = 1,691,698 : x
2. Step 2: Convert to fraction form
   717,648/1,691,698 = 1,691,698/x
3. Step 3: Cross multiply
   717,648x = 1,691,698 × 1,691,698
4. Step 4: Simplify right side
   717,648x = 2,861,842,123,204
5. Step 5: Solve for x
   x = 2,861,842,123,204/717,648
6. Step 6: Final answer
   x = 3,987,807.56