Finding the Third Proportional to 3,867,292 and 8,507,864

Step by Step Solution

1. Step 1: Write the proportion equation
   3,867,292 : 8,507,864 = 8,507,864 : x
2. Step 2: Convert to fraction form
   3,867,292/8,507,864 = 8,507,864/x
3. Step 3: Cross multiply
   3,867,292x = 8,507,864 × 8,507,864
4. Step 4: Simplify right side
   3,867,292x = 72,383,749,842,496
5. Step 5: Solve for x
   x = 72,383,749,842,496/3,867,292
6. Step 6: Final answer
   x = 18,716,908.33