Finding the Third Proportional to 515,136 and 1,086,208

Step by Step Solution

1. Step 1: Write the proportion equation
   515,136 : 1,086,208 = 1,086,208 : x
2. Step 2: Convert to fraction form
   515,136/1,086,208 = 1,086,208/x
3. Step 3: Cross multiply
   515,136x = 1,086,208 × 1,086,208
4. Step 4: Simplify right side
   515,136x = 1,179,847,819,264
5. Step 5: Solve for x
   x = 1,179,847,819,264/515,136
6. Step 6: Final answer
   x = 2,290,361.81