Finding the Third Proportional to 217,860 and 471,912

Step by Step Solution

1. Step 1: Write the proportion equation
   217,860 : 471,912 = 471,912 : x
2. Step 2: Convert to fraction form
   217,860/471,912 = 471,912/x
3. Step 3: Cross multiply
   217,860x = 471,912 × 471,912
4. Step 4: Simplify right side
   217,860x = 222,700,935,744
5. Step 5: Solve for x
   x = 222,700,935,744/217,860
6. Step 6: Final answer
   x = 1,022,220.40