Finding the Third Proportional to 161,436 and 318,732

Step by Step Solution

1. Step 1: Write the proportion equation
   161,436 : 318,732 = 318,732 : x
2. Step 2: Convert to fraction form
   161,436/318,732 = 318,732/x
3. Step 3: Cross multiply
   161,436x = 318,732 × 318,732
4. Step 4: Simplify right side
   161,436x = 101,590,087,824
5. Step 5: Solve for x
   x = 101,590,087,824/161,436
6. Step 6: Final answer
   x = 629,290.17