Finding the Third Proportional to 865,678 and 1,293,671.50

Step by Step Solution

1. Step 1: Write the proportion equation
   865,678 : 1,293,671.50 = 1,293,671.50 : x
2. Step 2: Convert to fraction form
   865,678/1,293,671.50 = 1,293,671.50/x
3. Step 3: Cross multiply
   865,678x = 1,293,671.50 × 1,293,671.50
4. Step 4: Simplify right side
   865,678x = 1,673,585,949,912.25
5. Step 5: Solve for x
   x = 1,673,585,949,912.25/865,678
6. Step 6: Final answer
   x = 1,933,266.12