Finding the Third Proportional to 218,268 and 326,057.75

Step by Step Solution

1. Step 1: Write the proportion equation
   218,268 : 326,057.75 = 326,057.75 : x
2. Step 2: Convert to fraction form
   218,268/326,057.75 = 326,057.75/x
3. Step 3: Cross multiply
   218,268x = 326,057.75 × 326,057.75
4. Step 4: Simplify right side
   218,268x = 106,313,656,335.06
5. Step 5: Solve for x
   x = 106,313,656,335.06/218,268
6. Step 6: Final answer
   x = 487,078.53