Finding the Third Proportional to 145,568 and 220,978

Step by Step Solution

1. Step 1: Write the proportion equation
   145,568 : 220,978 = 220,978 : x
2. Step 2: Convert to fraction form
   145,568/220,978 = 220,978/x
3. Step 3: Cross multiply
   145,568x = 220,978 × 220,978
4. Step 4: Simplify right side
   145,568x = 48,831,276,484
5. Step 5: Solve for x
   x = 48,831,276,484/145,568
6. Step 6: Final answer
   x = 335,453.37