Finding the Third Proportional to 4,991,152 and 10,218,741

Step by Step Solution

1. Step 1: Write the proportion equation
   4,991,152 : 10,218,741 = 10,218,741 : x
2. Step 2: Convert to fraction form
   4,991,152/10,218,741 = 10,218,741/x
3. Step 3: Cross multiply
   4,991,152x = 10,218,741 × 10,218,741
4. Step 4: Simplify right side
   4,991,152x = 104,422,667,625,081
5. Step 5: Solve for x
   x = 104,422,667,625,081/4,991,152
6. Step 6: Final answer
   x = 20,921,556.31