Finding the Third Proportional to 296,889 and 622,942.50

Step by Step Solution

1. Step 1: Write the proportion equation
   296,889 : 622,942.50 = 622,942.50 : x
2. Step 2: Convert to fraction form
   296,889/622,942.50 = 622,942.50/x
3. Step 3: Cross multiply
   296,889x = 622,942.50 × 622,942.50
4. Step 4: Simplify right side
   296,889x = 388,057,358,306.25
5. Step 5: Solve for x
   x = 388,057,358,306.25/296,889
6. Step 6: Final answer
   x = 1,307,078.94