Finding the Third Proportional to 3,927,268 and 8,641,855

Step by Step Solution

1. Step 1: Write the proportion equation
   3,927,268 : 8,641,855 = 8,641,855 : x
2. Step 2: Convert to fraction form
   3,927,268/8,641,855 = 8,641,855/x
3. Step 3: Cross multiply
   3,927,268x = 8,641,855 × 8,641,855
4. Step 4: Simplify right side
   3,927,268x = 74,681,657,841,025
5. Step 5: Solve for x
   x = 74,681,657,841,025/3,927,268
6. Step 6: Final answer
   x = 19,016,185.77