Finding the Third Proportional to 254,374 and 404,910

Step by Step Solution

1. Step 1: Write the proportion equation
   254,374 : 404,910 = 404,910 : x
2. Step 2: Convert to fraction form
   254,374/404,910 = 404,910/x
3. Step 3: Cross multiply
   254,374x = 404,910 × 404,910
4. Step 4: Simplify right side
   254,374x = 163,952,108,100
5. Step 5: Solve for x
   x = 163,952,108,100/254,374
6. Step 6: Final answer
   x = 644,531.71