Finding the Third Proportional to 191,545 and 388,558

Step by Step Solution

1. Step 1: Write the proportion equation
   191,545 : 388,558 = 388,558 : x
2. Step 2: Convert to fraction form
   191,545/388,558 = 388,558/x
3. Step 3: Cross multiply
   191,545x = 388,558 × 388,558
4. Step 4: Simplify right side
   191,545x = 150,977,319,364
5. Step 5: Solve for x
   x = 150,977,319,364/191,545
6. Step 6: Final answer
   x = 788,208.09