Finding the Third Proportional to 254,842 and 404,863.50

Step by Step Solution

1. Step 1: Write the proportion equation
   254,842 : 404,863.50 = 404,863.50 : x
2. Step 2: Convert to fraction form
   254,842/404,863.50 = 404,863.50/x
3. Step 3: Cross multiply
   254,842x = 404,863.50 × 404,863.50
4. Step 4: Simplify right side
   254,842x = 163,914,453,632.25
5. Step 5: Solve for x
   x = 163,914,453,632.25/254,842
6. Step 6: Final answer
   x = 643,200.31