Finding the Third Proportional to 145,939.50 and 320,610

Step by Step Solution

1. Step 1: Write the proportion equation
   145,939.50 : 320,610 = 320,610 : x
2. Step 2: Convert to fraction form
   145,939.50/320,610 = 320,610/x
3. Step 3: Cross multiply
   145,939.50x = 320,610 × 320,610
4. Step 4: Simplify right side
   145,939.50x = 102,790,772,100
5. Step 5: Solve for x
   x = 102,790,772,100/145,939.50
6. Step 6: Final answer
   x = 704,338.25