Finding the Third Proportional to 151,468 and 318,605

Step by Step Solution

1. Step 1: Write the proportion equation
   151,468 : 318,605 = 318,605 : x
2. Step 2: Convert to fraction form
   151,468/318,605 = 318,605/x
3. Step 3: Cross multiply
   151,468x = 318,605 × 318,605
4. Step 4: Simplify right side
   151,468x = 101,509,146,025
5. Step 5: Solve for x
   x = 101,509,146,025/151,468
6. Step 6: Final answer
   x = 670,168.92