Finding the Third Proportional to 161,420 and 342,064

Step by Step Solution

1. Step 1: Write the proportion equation
   161,420 : 342,064 = 342,064 : x
2. Step 2: Convert to fraction form
   161,420/342,064 = 342,064/x
3. Step 3: Cross multiply
   161,420x = 342,064 × 342,064
4. Step 4: Simplify right side
   161,420x = 117,007,780,096
5. Step 5: Solve for x
   x = 117,007,780,096/161,420
6. Step 6: Final answer
   x = 724,865.44