Finding the Third Proportional to 149,812.50 and 320,949

Step by Step Solution

1. Step 1: Write the proportion equation
   149,812.50 : 320,949 = 320,949 : x
2. Step 2: Convert to fraction form
   149,812.50/320,949 = 320,949/x
3. Step 3: Cross multiply
   149,812.50x = 320,949 × 320,949
4. Step 4: Simplify right side
   149,812.50x = 103,008,260,601
5. Step 5: Solve for x
   x = 103,008,260,601/149,812.50
6. Step 6: Final answer
   x = 687,581.21