Finding the Third Proportional to 161,388 and 345,012

Step by Step Solution

1. Step 1: Write the proportion equation
   161,388 : 345,012 = 345,012 : x
2. Step 2: Convert to fraction form
   161,388/345,012 = 345,012/x
3. Step 3: Cross multiply
   161,388x = 345,012 × 345,012
4. Step 4: Simplify right side
   161,388x = 119,033,280,144
5. Step 5: Solve for x
   x = 119,033,280,144/161,388
6. Step 6: Final answer
   x = 737,559.67