Finding the Third Proportional to 333,973.50 and 679,609.50

Step by Step Solution

1. Step 1: Write the proportion equation
   333,973.50 : 679,609.50 = 679,609.50 : x
2. Step 2: Convert to fraction form
   333,973.50/679,609.50 = 679,609.50/x
3. Step 3: Cross multiply
   333,973.50x = 679,609.50 × 679,609.50
4. Step 4: Simplify right side
   333,973.50x = 461,869,072,490.25
5. Step 5: Solve for x
   x = 461,869,072,490.25/333,973.50
6. Step 6: Final answer
   x = 1,382,951.26