Finding the Third Proportional to 388,868.50 and 808,777

Step by Step Solution

1. Step 1: Write the proportion equation
   388,868.50 : 808,777 = 808,777 : x
2. Step 2: Convert to fraction form
   388,868.50/808,777 = 808,777/x
3. Step 3: Cross multiply
   388,868.50x = 808,777 × 808,777
4. Step 4: Simplify right side
   388,868.50x = 654,120,235,729
5. Step 5: Solve for x
   x = 654,120,235,729/388,868.50
6. Step 6: Final answer
   x = 1,682,111.65