Finding the Third Proportional to 254,934 and 404,898

Step by Step Solution

1. Step 1: Write the proportion equation
   254,934 : 404,898 = 404,898 : x
2. Step 2: Convert to fraction form
   254,934/404,898 = 404,898/x
3. Step 3: Cross multiply
   254,934x = 404,898 × 404,898
4. Step 4: Simplify right side
   254,934x = 163,942,390,404
5. Step 5: Solve for x
   x = 163,942,390,404/254,934
6. Step 6: Final answer
   x = 643,077.78