Finding the Third Proportional to 254,837.25 and 404,856

Step by Step Solution

1. Step 1: Write the proportion equation
   254,837.25 : 404,856 = 404,856 : x
2. Step 2: Convert to fraction form
   254,837.25/404,856 = 404,856/x
3. Step 3: Cross multiply
   254,837.25x = 404,856 × 404,856
4. Step 4: Simplify right side
   254,837.25x = 163,908,380,736
5. Step 5: Solve for x
   x = 163,908,380,736/254,837.25
6. Step 6: Final answer
   x = 643,188.47