Finding the Third Proportional to 191,592 and 388,656

Step by Step Solution

1. Step 1: Write the proportion equation
   191,592 : 388,656 = 388,656 : x
2. Step 2: Convert to fraction form
   191,592/388,656 = 388,656/x
3. Step 3: Cross multiply
   191,592x = 388,656 × 388,656
4. Step 4: Simplify right side
   191,592x = 151,053,486,336
5. Step 5: Solve for x
   x = 151,053,486,336/191,592
6. Step 6: Final answer
   x = 788,412.28