Finding the Third Proportional to 865,683 and 1,293,678

Step by Step Solution

1. Step 1: Write the proportion equation
   865,683 : 1,293,678 = 1,293,678 : x
2. Step 2: Convert to fraction form
   865,683/1,293,678 = 1,293,678/x
3. Step 3: Cross multiply
   865,683x = 1,293,678 × 1,293,678
4. Step 4: Simplify right side
   865,683x = 1,673,602,767,684
5. Step 5: Solve for x
   x = 1,673,602,767,684/865,683
6. Step 6: Final answer
   x = 1,933,274.38