Finding the Third Proportional to 864,678 and 1,293,561

Step by Step Solution

1. Step 1: Write the proportion equation
   864,678 : 1,293,561 = 1,293,561 : x
2. Step 2: Convert to fraction form
   864,678/1,293,561 = 1,293,561/x
3. Step 3: Cross multiply
   864,678x = 1,293,561 × 1,293,561
4. Step 4: Simplify right side
   864,678x = 1,673,300,060,721
5. Step 5: Solve for x
   x = 1,673,300,060,721/864,678
6. Step 6: Final answer
   x = 1,935,171.31