Finding the Third Proportional to 685,437 and 1,067,152.50

Step by Step Solution

1. Step 1: Write the proportion equation
   685,437 : 1,067,152.50 = 1,067,152.50 : x
2. Step 2: Convert to fraction form
   685,437/1,067,152.50 = 1,067,152.50/x
3. Step 3: Cross multiply
   685,437x = 1,067,152.50 × 1,067,152.50
4. Step 4: Simplify right side
   685,437x = 1,138,814,458,256.25
5. Step 5: Solve for x
   x = 1,138,814,458,256.25/685,437
6. Step 6: Final answer
   x = 1,661,442.93