Finding the Third Proportional to 388,365 and 830,697

Step by Step Solution

1. Step 1: Write the proportion equation
   388,365 : 830,697 = 830,697 : x
2. Step 2: Convert to fraction form
   388,365/830,697 = 830,697/x
3. Step 3: Cross multiply
   388,365x = 830,697 × 830,697
4. Step 4: Simplify right side
   388,365x = 690,057,505,809
5. Step 5: Solve for x
   x = 690,057,505,809/388,365
6. Step 6: Final answer
   x = 1,776,827.23