Finding the Third Proportional to 207,451.50 and 320,388

Step by Step Solution

1. Step 1: Write the proportion equation
   207,451.50 : 320,388 = 320,388 : x
2. Step 2: Convert to fraction form
   207,451.50/320,388 = 320,388/x
3. Step 3: Cross multiply
   207,451.50x = 320,388 × 320,388
4. Step 4: Simplify right side
   207,451.50x = 102,648,470,544
5. Step 5: Solve for x
   x = 102,648,470,544/207,451.50
6. Step 6: Final answer
   x = 494,807.08