Finding the Third Proportional to 687,992 and 1,042,368

Step by Step Solution

1. Step 1: Write the proportion equation
   687,992 : 1,042,368 = 1,042,368 : x
2. Step 2: Convert to fraction form
   687,992/1,042,368 = 1,042,368/x
3. Step 3: Cross multiply
   687,992x = 1,042,368 × 1,042,368
4. Step 4: Simplify right side
   687,992x = 1,086,531,047,424
5. Step 5: Solve for x
   x = 1,086,531,047,424/687,992
6. Step 6: Final answer
   x = 1,579,278.61