Finding the Third Proportional to 161,608 and 345,680

Step by Step Solution

1. Step 1: Write the proportion equation
   161,608 : 345,680 = 345,680 : x
2. Step 2: Convert to fraction form
   161,608/345,680 = 345,680/x
3. Step 3: Cross multiply
   161,608x = 345,680 × 345,680
4. Step 4: Simplify right side
   161,608x = 119,494,662,400
5. Step 5: Solve for x
   x = 119,494,662,400/161,608
6. Step 6: Final answer
   x = 739,410.56