Finding the Third Proportional to 4,703,726 and 9,972,649

Step by Step Solution

1. Step 1: Write the proportion equation
   4,703,726 : 9,972,649 = 9,972,649 : x
2. Step 2: Convert to fraction form
   4,703,726/9,972,649 = 9,972,649/x
3. Step 3: Cross multiply
   4,703,726x = 9,972,649 × 9,972,649
4. Step 4: Simplify right side
   4,703,726x = 99,453,728,077,201
5. Step 5: Solve for x
   x = 99,453,728,077,201/4,703,726
6. Step 6: Final answer
   x = 21,143,605.75