Finding the Third Proportional to 717,634 and 1,691,665

Step by Step Solution

1. Step 1: Write the proportion equation
   717,634 : 1,691,665 = 1,691,665 : x
2. Step 2: Convert to fraction form
   717,634/1,691,665 = 1,691,665/x
3. Step 3: Cross multiply
   717,634x = 1,691,665 × 1,691,665
4. Step 4: Simplify right side
   717,634x = 2,861,730,472,225
5. Step 5: Solve for x
   x = 2,861,730,472,225/717,634
6. Step 6: Final answer
   x = 3,987,729.78