Finding the Third Proportional to 315,680 and 693,568

Step by Step Solution

1. Step 1: Write the proportion equation
   315,680 : 693,568 = 693,568 : x
2. Step 2: Convert to fraction form
   315,680/693,568 = 693,568/x
3. Step 3: Cross multiply
   315,680x = 693,568 × 693,568
4. Step 4: Simplify right side
   315,680x = 481,036,570,624
5. Step 5: Solve for x
   x = 481,036,570,624/315,680
6. Step 6: Final answer
   x = 1,523,810.73