Finding the Third Proportional to 151,469 and 318,607

Step by Step Solution

1. Step 1: Write the proportion equation
   151,469 : 318,607 = 318,607 : x
2. Step 2: Convert to fraction form
   151,469/318,607 = 318,607/x
3. Step 3: Cross multiply
   151,469x = 318,607 × 318,607
4. Step 4: Simplify right side
   151,469x = 101,510,420,449
5. Step 5: Solve for x
   x = 101,510,420,449/151,469
6. Step 6: Final answer
   x = 670,172.91