Finding the Third Proportional to 254,852 and 404,878

Step by Step Solution

1. Step 1: Write the proportion equation
   254,852 : 404,878 = 404,878 : x
2. Step 2: Convert to fraction form
   254,852/404,878 = 404,878/x
3. Step 3: Cross multiply
   254,852x = 404,878 × 404,878
4. Step 4: Simplify right side
   254,852x = 163,926,194,884
5. Step 5: Solve for x
   x = 163,926,194,884/254,852
6. Step 6: Final answer
   x = 643,221.14