Finding the Third Proportional to 865,684 and 1,293,680

Step by Step Solution

1. Step 1: Write the proportion equation
   865,684 : 1,293,680 = 1,293,680 : x
2. Step 2: Convert to fraction form
   865,684/1,293,680 = 1,293,680/x
3. Step 3: Cross multiply
   865,684x = 1,293,680 × 1,293,680
4. Step 4: Simplify right side
   865,684x = 1,673,607,942,400
5. Step 5: Solve for x
   x = 1,673,607,942,400/865,684
6. Step 6: Final answer
   x = 1,933,278.13