Finding the Third Proportional to 254,848 and 404,872

Step by Step Solution

1. Step 1: Write the proportion equation
   254,848 : 404,872 = 404,872 : x
2. Step 2: Convert to fraction form
   254,848/404,872 = 404,872/x
3. Step 3: Cross multiply
   254,848x = 404,872 × 404,872
4. Step 4: Simplify right side
   254,848x = 163,921,336,384
5. Step 5: Solve for x
   x = 163,921,336,384/254,848
6. Step 6: Final answer
   x = 643,212.18