Finding the Third Proportional to 161,907 and 343,543.50

Step by Step Solution

1. Step 1: Write the proportion equation
   161,907 : 343,543.50 = 343,543.50 : x
2. Step 2: Convert to fraction form
   161,907/343,543.50 = 343,543.50/x
3. Step 3: Cross multiply
   161,907x = 343,543.50 × 343,543.50
4. Step 4: Simplify right side
   161,907x = 118,022,136,392.25
5. Step 5: Solve for x
   x = 118,022,136,392.25/161,907
6. Step 6: Final answer
   x = 728,950.18