Finding the Third Proportional to 4,170,615 and 9,138,390

Step by Step Solution

1. Step 1: Write the proportion equation
   4,170,615 : 9,138,390 = 9,138,390 : x
2. Step 2: Convert to fraction form
   4,170,615/9,138,390 = 9,138,390/x
3. Step 3: Cross multiply
   4,170,615x = 9,138,390 × 9,138,390
4. Step 4: Simplify right side
   4,170,615x = 83,510,171,792,100
5. Step 5: Solve for x
   x = 83,510,171,792,100/4,170,615
6. Step 6: Final answer
   x = 20,023,466.99