Finding the Third Proportional to 191,544 and 388,556

Step by Step Solution

1. Step 1: Write the proportion equation
   191,544 : 388,556 = 388,556 : x
2. Step 2: Convert to fraction form
   191,544/388,556 = 388,556/x
3. Step 3: Cross multiply
   191,544x = 388,556 × 388,556
4. Step 4: Simplify right side
   191,544x = 150,975,765,136
5. Step 5: Solve for x
   x = 150,975,765,136/191,544
6. Step 6: Final answer
   x = 788,204.09