Finding the Third Proportional to 386,386.31 and 839,305.69

Step by Step Solution

1. Step 1: Write the proportion equation
   386,386.31 : 839,305.69 = 839,305.69 : x
2. Step 2: Convert to fraction form
   386,386.31/839,305.69 = 839,305.69/x
3. Step 3: Cross multiply
   386,386.31x = 839,305.69 × 839,305.69
4. Step 4: Simplify right side
   386,386.31x = 704,434,037,069.85
5. Step 5: Solve for x
   x = 704,434,037,069.85/386,386.31
6. Step 6: Final answer
   x = 1,823,134.04