Finding the Third Proportional to 515,629 and 796,777.50

Step by Step Solution

1. Step 1: Write the proportion equation
   515,629 : 796,777.50 = 796,777.50 : x
2. Step 2: Convert to fraction form
   515,629/796,777.50 = 796,777.50/x
3. Step 3: Cross multiply
   515,629x = 796,777.50 × 796,777.50
4. Step 4: Simplify right side
   515,629x = 634,854,384,506.25
5. Step 5: Solve for x
   x = 634,854,384,506.25/515,629
6. Step 6: Final answer
   x = 1,231,223.19