Finding the Third Proportional to 218,578 and 471,608

Step by Step Solution

1. Step 1: Write the proportion equation
   218,578 : 471,608 = 471,608 : x
2. Step 2: Convert to fraction form
   218,578/471,608 = 471,608/x
3. Step 3: Cross multiply
   218,578x = 471,608 × 471,608
4. Step 4: Simplify right side
   218,578x = 222,414,105,664
5. Step 5: Solve for x
   x = 222,414,105,664/218,578
6. Step 6: Final answer
   x = 1,017,550.28