Finding the Third Proportional to 4,021,686 and 8,765,916

Step by Step Solution

1. Step 1: Write the proportion equation
   4,021,686 : 8,765,916 = 8,765,916 : x
2. Step 2: Convert to fraction form
   4,021,686/8,765,916 = 8,765,916/x
3. Step 3: Cross multiply
   4,021,686x = 8,765,916 × 8,765,916
4. Step 4: Simplify right side
   4,021,686x = 76,841,283,319,056
5. Step 5: Solve for x
   x = 76,841,283,319,056/4,021,686
6. Step 6: Final answer
   x = 19,106,733.67