Finding the Third Proportional to 313,830 and 691,002

Step by Step Solution

1. Step 1: Write the proportion equation
   313,830 : 691,002 = 691,002 : x
2. Step 2: Convert to fraction form
   313,830/691,002 = 691,002/x
3. Step 3: Cross multiply
   313,830x = 691,002 × 691,002
4. Step 4: Simplify right side
   313,830x = 477,483,764,004
5. Step 5: Solve for x
   x = 477,483,764,004/313,830
6. Step 6: Final answer
   x = 1,521,472.66