Finding the Third Proportional to 321,007.50 and 683,487

Step by Step Solution

1. Step 1: Write the proportion equation
   321,007.50 : 683,487 = 683,487 : x
2. Step 2: Convert to fraction form
   321,007.50/683,487 = 683,487/x
3. Step 3: Cross multiply
   321,007.50x = 683,487 × 683,487
4. Step 4: Simplify right side
   321,007.50x = 467,154,479,169
5. Step 5: Solve for x
   x = 467,154,479,169/321,007.50
6. Step 6: Final answer
   x = 1,455,275.90