Finding the Third Proportional to 3,961,640 and 8,680,474

Step by Step Solution

1. Step 1: Write the proportion equation
   3,961,640 : 8,680,474 = 8,680,474 : x
2. Step 2: Convert to fraction form
   3,961,640/8,680,474 = 8,680,474/x
3. Step 3: Cross multiply
   3,961,640x = 8,680,474 × 8,680,474
4. Step 4: Simplify right side
   3,961,640x = 75,350,628,864,676
5. Step 5: Solve for x
   x = 75,350,628,864,676/3,961,640
6. Step 6: Final answer
   x = 19,020,059.59