Finding the Third Proportional to 3,989,539 and 8,776,118

Step by Step Solution

1. Step 1: Write the proportion equation
   3,989,539 : 8,776,118 = 8,776,118 : x
2. Step 2: Convert to fraction form
   3,989,539/8,776,118 = 8,776,118/x
3. Step 3: Cross multiply
   3,989,539x = 8,776,118 × 8,776,118
4. Step 4: Simplify right side
   3,989,539x = 77,020,247,149,924
5. Step 5: Solve for x
   x = 77,020,247,149,924/3,989,539
6. Step 6: Final answer
   x = 19,305,550.63