Finding the Third Proportional to 389,308 and 839,384

Step by Step Solution

1. Step 1: Write the proportion equation
   389,308 : 839,384 = 839,384 : x
2. Step 2: Convert to fraction form
   389,308/839,384 = 839,384/x
3. Step 3: Cross multiply
   389,308x = 839,384 × 839,384
4. Step 4: Simplify right side
   389,308x = 704,565,499,456
5. Step 5: Solve for x
   x = 704,565,499,456/389,308
6. Step 6: Final answer
   x = 1,809,789.42