Finding the Third Proportional to 3,940,911 and 8,471,190

Step by Step Solution

1. Step 1: Write the proportion equation
   3,940,911 : 8,471,190 = 8,471,190 : x
2. Step 2: Convert to fraction form
   3,940,911/8,471,190 = 8,471,190/x
3. Step 3: Cross multiply
   3,940,911x = 8,471,190 × 8,471,190
4. Step 4: Simplify right side
   3,940,911x = 71,761,060,016,100
5. Step 5: Solve for x
   x = 71,761,060,016,100/3,940,911
6. Step 6: Final answer
   x = 18,209,256.70