Finding the Third Proportional to 328,984.50 and 683,818.50

Step by Step Solution

1. Step 1: Write the proportion equation
   328,984.50 : 683,818.50 = 683,818.50 : x
2. Step 2: Convert to fraction form
   328,984.50/683,818.50 = 683,818.50/x
3. Step 3: Cross multiply
   328,984.50x = 683,818.50 × 683,818.50
4. Step 4: Simplify right side
   328,984.50x = 467,607,740,942.25
5. Step 5: Solve for x
   x = 467,607,740,942.25/328,984.50
6. Step 6: Final answer
   x = 1,421,367.09