Finding the Third Proportional to 1,199,816 and 1,687,458

Step by Step Solution

1. Step 1: Write the proportion equation
   1,199,816 : 1,687,458 = 1,687,458 : x
2. Step 2: Convert to fraction form
   1,199,816/1,687,458 = 1,687,458/x
3. Step 3: Cross multiply
   1,199,816x = 1,687,458 × 1,687,458
4. Step 4: Simplify right side
   1,199,816x = 2,847,514,501,764
5. Step 5: Solve for x
   x = 2,847,514,501,764/1,199,816
6. Step 6: Final answer
   x = 2,373,292.66