Finding the Third Proportional to 2,171,648 and 4,679,890

Step by Step Solution

1. Step 1: Write the proportion equation
   2,171,648 : 4,679,890 = 4,679,890 : x
2. Step 2: Convert to fraction form
   2,171,648/4,679,890 = 4,679,890/x
3. Step 3: Cross multiply
   2,171,648x = 4,679,890 × 4,679,890
4. Step 4: Simplify right side
   2,171,648x = 21,901,370,412,100
5. Step 5: Solve for x
   x = 21,901,370,412,100/2,171,648
6. Step 6: Final answer
   x = 10,085,138.30