Finding the Third Proportional to 319,648.50 and 485,304

Step by Step Solution

1. Step 1: Write the proportion equation
   319,648.50 : 485,304 = 485,304 : x
2. Step 2: Convert to fraction form
   319,648.50/485,304 = 485,304/x
3. Step 3: Cross multiply
   319,648.50x = 485,304 × 485,304
4. Step 4: Simplify right side
   319,648.50x = 235,519,972,416
5. Step 5: Solve for x
   x = 235,519,972,416/319,648.50
6. Step 6: Final answer
   x = 736,809.25