Finding the Third Proportional to 315,700 and 693,608

Step by Step Solution

1. Step 1: Write the proportion equation
   315,700 : 693,608 = 693,608 : x
2. Step 2: Convert to fraction form
   315,700/693,608 = 693,608/x
3. Step 3: Cross multiply
   315,700x = 693,608 × 693,608
4. Step 4: Simplify right side
   315,700x = 481,092,057,664
5. Step 5: Solve for x
   x = 481,092,057,664/315,700
6. Step 6: Final answer
   x = 1,523,889.95