Finding the Third Proportional to 151,369.50 and 321,189

Step by Step Solution

1. Step 1: Write the proportion equation
   151,369.50 : 321,189 = 321,189 : x
2. Step 2: Convert to fraction form
   151,369.50/321,189 = 321,189/x
3. Step 3: Cross multiply
   151,369.50x = 321,189 × 321,189
4. Step 4: Simplify right side
   151,369.50x = 103,162,373,721
5. Step 5: Solve for x
   x = 103,162,373,721/151,369.50
6. Step 6: Final answer
   x = 681,526.82