Finding the Third Proportional to 213,273 and 320,456.25

Step by Step Solution

1. Step 1: Write the proportion equation
   213,273 : 320,456.25 = 320,456.25 : x
2. Step 2: Convert to fraction form
   213,273/320,456.25 = 320,456.25/x
3. Step 3: Cross multiply
   213,273x = 320,456.25 × 320,456.25
4. Step 4: Simplify right side
   213,273x = 102,692,208,164.06
5. Step 5: Solve for x
   x = 102,692,208,164.06/213,273
6. Step 6: Final answer
   x = 481,505.90