Finding the Third Proportional to 218,722 and 476,972

Step by Step Solution

1. Step 1: Write the proportion equation
   218,722 : 476,972 = 476,972 : x
2. Step 2: Convert to fraction form
   218,722/476,972 = 476,972/x
3. Step 3: Cross multiply
   218,722x = 476,972 × 476,972
4. Step 4: Simplify right side
   218,722x = 227,502,288,784
5. Step 5: Solve for x
   x = 227,502,288,784/218,722
6. Step 6: Final answer
   x = 1,040,143.60