Finding the Third Proportional to 685,434 and 1,067,148

Step by Step Solution

1. Step 1: Write the proportion equation
   685,434 : 1,067,148 = 1,067,148 : x
2. Step 2: Convert to fraction form
   685,434/1,067,148 = 1,067,148/x
3. Step 3: Cross multiply
   685,434x = 1,067,148 × 1,067,148
4. Step 4: Simplify right side
   685,434x = 1,138,804,853,904
5. Step 5: Solve for x
   x = 1,138,804,853,904/685,434
6. Step 6: Final answer
   x = 1,661,436.19