Finding the Third Proportional to 687,900 and 1,042,236

Step by Step Solution

1. Step 1: Write the proportion equation
   687,900 : 1,042,236 = 1,042,236 : x
2. Step 2: Convert to fraction form
   687,900/1,042,236 = 1,042,236/x
3. Step 3: Cross multiply
   687,900x = 1,042,236 × 1,042,236
4. Step 4: Simplify right side
   687,900x = 1,086,255,879,696
5. Step 5: Solve for x
   x = 1,086,255,879,696/687,900
6. Step 6: Final answer
   x = 1,579,089.81