Finding the Third Proportional to 3,890,440 and 8,380,116

Step by Step Solution

1. Step 1: Write the proportion equation
   3,890,440 : 8,380,116 = 8,380,116 : x
2. Step 2: Convert to fraction form
   3,890,440/8,380,116 = 8,380,116/x
3. Step 3: Cross multiply
   3,890,440x = 8,380,116 × 8,380,116
4. Step 4: Simplify right side
   3,890,440x = 70,226,344,173,456
5. Step 5: Solve for x
   x = 70,226,344,173,456/3,890,440
6. Step 6: Final answer
   x = 18,051,003.02