Finding the Third Proportional to 515,139.75 and 788,022

Step by Step Solution

1. Step 1: Write the proportion equation
   515,139.75 : 788,022 = 788,022 : x
2. Step 2: Convert to fraction form
   515,139.75/788,022 = 788,022/x
3. Step 3: Cross multiply
   515,139.75x = 788,022 × 788,022
4. Step 4: Simplify right side
   515,139.75x = 620,978,672,484
5. Step 5: Solve for x
   x = 620,978,672,484/515,139.75
6. Step 6: Final answer
   x = 1,205,456.72