Finding the Third Proportional to 515,889 and 797,161.50

Step by Step Solution

1. Step 1: Write the proportion equation
   515,889 : 797,161.50 = 797,161.50 : x
2. Step 2: Convert to fraction form
   515,889/797,161.50 = 797,161.50/x
3. Step 3: Cross multiply
   515,889x = 797,161.50 × 797,161.50
4. Step 4: Simplify right side
   515,889x = 635,466,457,082.25
5. Step 5: Solve for x
   x = 635,466,457,082.25/515,889
6. Step 6: Final answer
   x = 1,231,789.12