Finding the Third Proportional to 254,464.50 and 394,212

Step by Step Solution

1. Step 1: Write the proportion equation
   254,464.50 : 394,212 = 394,212 : x
2. Step 2: Convert to fraction form
   254,464.50/394,212 = 394,212/x
3. Step 3: Cross multiply
   254,464.50x = 394,212 × 394,212
4. Step 4: Simplify right side
   254,464.50x = 155,403,100,944
5. Step 5: Solve for x
   x = 155,403,100,944/254,464.50
6. Step 6: Final answer
   x = 610,706.41