Finding the Third Proportional to 389,070 and 836,268.75

Step by Step Solution

1. Step 1: Write the proportion equation
   389,070 : 836,268.75 = 836,268.75 : x
2. Step 2: Convert to fraction form
   389,070/836,268.75 = 836,268.75/x
3. Step 3: Cross multiply
   389,070x = 836,268.75 × 836,268.75
4. Step 4: Simplify right side
   389,070x = 699,345,422,226.56
5. Step 5: Solve for x
   x = 699,345,422,226.56/389,070
6. Step 6: Final answer
   x = 1,797,479.69