Finding the Third Proportional to 687,908 and 1,042,248

Step by Step Solution

1. Step 1: Write the proportion equation
   687,908 : 1,042,248 = 1,042,248 : x
2. Step 2: Convert to fraction form
   687,908/1,042,248 = 1,042,248/x
3. Step 3: Cross multiply
   687,908x = 1,042,248 × 1,042,248
4. Step 4: Simplify right side
   687,908x = 1,086,280,893,504
5. Step 5: Solve for x
   x = 1,086,280,893,504/687,908
6. Step 6: Final answer
   x = 1,579,107.81