Finding the Third Proportional to 305,239.50 and 663,012

Step by Step Solution

1. Step 1: Write the proportion equation
   305,239.50 : 663,012 = 663,012 : x
2. Step 2: Convert to fraction form
   305,239.50/663,012 = 663,012/x
3. Step 3: Cross multiply
   305,239.50x = 663,012 × 663,012
4. Step 4: Simplify right side
   305,239.50x = 439,584,912,144
5. Step 5: Solve for x
   x = 439,584,912,144/305,239.50
6. Step 6: Final answer
   x = 1,440,131.15