Finding the Third Proportional to 3,989,538 and 8,776,116

Step by Step Solution

1. Step 1: Write the proportion equation
   3,989,538 : 8,776,116 = 8,776,116 : x
2. Step 2: Convert to fraction form
   3,989,538/8,776,116 = 8,776,116/x
3. Step 3: Cross multiply
   3,989,538x = 8,776,116 × 8,776,116
4. Step 4: Simplify right side
   3,989,538x = 77,020,212,045,456
5. Step 5: Solve for x
   x = 77,020,212,045,456/3,989,538
6. Step 6: Final answer
   x = 19,305,546.67