Finding the Third Proportional to 4,218,744 and 8,736,564

Step by Step Solution

1. Step 1: Write the proportion equation
   4,218,744 : 8,736,564 = 8,736,564 : x
2. Step 2: Convert to fraction form
   4,218,744/8,736,564 = 8,736,564/x
3. Step 3: Cross multiply
   4,218,744x = 8,736,564 × 8,736,564
4. Step 4: Simplify right side
   4,218,744x = 76,327,550,526,096
5. Step 5: Solve for x
   x = 76,327,550,526,096/4,218,744
6. Step 6: Final answer
   x = 18,092,482.15