Finding the Third Proportional to 254,364 and 404,899.50

Step by Step Solution

1. Step 1: Write the proportion equation
   254,364 : 404,899.50 = 404,899.50 : x
2. Step 2: Convert to fraction form
   254,364/404,899.50 = 404,899.50/x
3. Step 3: Cross multiply
   254,364x = 404,899.50 × 404,899.50
4. Step 4: Simplify right side
   254,364x = 163,943,605,100.25
5. Step 5: Solve for x
   x = 163,943,605,100.25/254,364
6. Step 6: Final answer
   x = 644,523.62