Finding the Third Proportional to 515,136 and 788,012

Step by Step Solution

1. Step 1: Write the proportion equation
   515,136 : 788,012 = 788,012 : x
2. Step 2: Convert to fraction form
   515,136/788,012 = 788,012/x
3. Step 3: Cross multiply
   515,136x = 788,012 × 788,012
4. Step 4: Simplify right side
   515,136x = 620,962,912,144
5. Step 5: Solve for x
   x = 620,962,912,144/515,136
6. Step 6: Final answer
   x = 1,205,434.90