Finding the Third Proportional to 191,538 and 388,548

Step by Step Solution

1. Step 1: Write the proportion equation
   191,538 : 388,548 = 388,548 : x
2. Step 2: Convert to fraction form
   191,538/388,548 = 388,548/x
3. Step 3: Cross multiply
   191,538x = 388,548 × 388,548
4. Step 4: Simplify right side
   191,538x = 150,969,548,304
5. Step 5: Solve for x
   x = 150,969,548,304/191,538
6. Step 6: Final answer
   x = 788,196.33