Finding the Third Proportional to 388,839.25 and 808,718

Step by Step Solution

1. Step 1: Write the proportion equation
   388,839.25 : 808,718 = 808,718 : x
2. Step 2: Convert to fraction form
   388,839.25/808,718 = 808,718/x
3. Step 3: Cross multiply
   388,839.25x = 808,718 × 808,718
4. Step 4: Simplify right side
   388,839.25x = 654,024,803,524
5. Step 5: Solve for x
   x = 654,024,803,524/388,839.25
6. Step 6: Final answer
   x = 1,681,992.76