Finding the Third Proportional to 177,790.50 and 388,791

Step by Step Solution

1. Step 1: Write the proportion equation
   177,790.50 : 388,791 = 388,791 : x
2. Step 2: Convert to fraction form
   177,790.50/388,791 = 388,791/x
3. Step 3: Cross multiply
   177,790.50x = 388,791 × 388,791
4. Step 4: Simplify right side
   177,790.50x = 151,158,441,681
5. Step 5: Solve for x
   x = 151,158,441,681/177,790.50
6. Step 6: Final answer
   x = 850,205.39