Finding the Third Proportional to 213,284 and 321,277.75

Step by Step Solution

1. Step 1: Write the proportion equation
   213,284 : 321,277.75 = 321,277.75 : x
2. Step 2: Convert to fraction form
   213,284/321,277.75 = 321,277.75/x
3. Step 3: Cross multiply
   213,284x = 321,277.75 × 321,277.75
4. Step 4: Simplify right side
   213,284x = 103,219,392,645.06
5. Step 5: Solve for x
   x = 103,219,392,645.06/213,284
6. Step 6: Final answer
   x = 483,952.82