Finding the Third Proportional to 191,540 and 388,550

Step by Step Solution

1. Step 1: Write the proportion equation
   191,540 : 388,550 = 388,550 : x
2. Step 2: Convert to fraction form
   191,540/388,550 = 388,550/x
3. Step 3: Cross multiply
   191,540x = 388,550 × 388,550
4. Step 4: Simplify right side
   191,540x = 150,971,102,500
5. Step 5: Solve for x
   x = 150,971,102,500/191,540
6. Step 6: Final answer
   x = 788,196.21