Finding the Third Proportional to 181,819.50 and 388,911

Step by Step Solution

1. Step 1: Write the proportion equation
   181,819.50 : 388,911 = 388,911 : x
2. Step 2: Convert to fraction form
   181,819.50/388,911 = 388,911/x
3. Step 3: Cross multiply
   181,819.50x = 388,911 × 388,911
4. Step 4: Simplify right side
   181,819.50x = 151,251,765,921
5. Step 5: Solve for x
   x = 151,251,765,921/181,819.50
6. Step 6: Final answer
   x = 831,878.68