Finding the Third Proportional to 687,924 and 1,042,290

Step by Step Solution

1. Step 1: Write the proportion equation
   687,924 : 1,042,290 = 1,042,290 : x
2. Step 2: Convert to fraction form
   687,924/1,042,290 = 1,042,290/x
3. Step 3: Cross multiply
   687,924x = 1,042,290 × 1,042,290
4. Step 4: Simplify right side
   687,924x = 1,086,368,444,100
5. Step 5: Solve for x
   x = 1,086,368,444,100/687,924
6. Step 6: Final answer
   x = 1,579,198.35