Finding the Third Proportional to 687,904 and 1,042,242

Step by Step Solution

1. Step 1: Write the proportion equation
   687,904 : 1,042,242 = 1,042,242 : x
2. Step 2: Convert to fraction form
   687,904/1,042,242 = 1,042,242/x
3. Step 3: Cross multiply
   687,904x = 1,042,242 × 1,042,242
4. Step 4: Simplify right side
   687,904x = 1,086,268,386,564
5. Step 5: Solve for x
   x = 1,086,268,386,564/687,904
6. Step 6: Final answer
   x = 1,579,098.81