Finding the Third Proportional to 218,906 and 471,988

Step by Step Solution

1. Step 1: Write the proportion equation
   218,906 : 471,988 = 471,988 : x
2. Step 2: Convert to fraction form
   218,906/471,988 = 471,988/x
3. Step 3: Cross multiply
   218,906x = 471,988 × 471,988
4. Step 4: Simplify right side
   218,906x = 222,772,672,144
5. Step 5: Solve for x
   x = 222,772,672,144/218,906
6. Step 6: Final answer
   x = 1,017,663.62