Finding the Third Proportional to 254,938 and 404,906

Step by Step Solution

1. Step 1: Write the proportion equation
   254,938 : 404,906 = 404,906 : x
2. Step 2: Convert to fraction form
   254,938/404,906 = 404,906/x
3. Step 3: Cross multiply
   254,938x = 404,906 × 404,906
4. Step 4: Simplify right side
   254,938x = 163,948,868,836
5. Step 5: Solve for x
   x = 163,948,868,836/254,938
6. Step 6: Final answer
   x = 643,093.10