Finding the Third Proportional to 515,784 and 788,496

Step by Step Solution

1. Step 1: Write the proportion equation
   515,784 : 788,496 = 788,496 : x
2. Step 2: Convert to fraction form
   515,784/788,496 = 788,496/x
3. Step 3: Cross multiply
   515,784x = 788,496 × 788,496
4. Step 4: Simplify right side
   515,784x = 621,725,942,016
5. Step 5: Solve for x
   x = 621,725,942,016/515,784
6. Step 6: Final answer
   x = 1,205,399.82