Finding the Third Proportional to 515,128 and 788,002

Step by Step Solution

1. Step 1: Write the proportion equation
   515,128 : 788,002 = 788,002 : x
2. Step 2: Convert to fraction form
   515,128/788,002 = 788,002/x
3. Step 3: Cross multiply
   515,128x = 788,002 × 788,002
4. Step 4: Simplify right side
   515,128x = 620,947,152,004
5. Step 5: Solve for x
   x = 620,947,152,004/515,128
6. Step 6: Final answer
   x = 1,205,423.02