Finding the Third Proportional to 4,203,648 and 8,742,780

Step by Step Solution

1. Step 1: Write the proportion equation
   4,203,648 : 8,742,780 = 8,742,780 : x
2. Step 2: Convert to fraction form
   4,203,648/8,742,780 = 8,742,780/x
3. Step 3: Cross multiply
   4,203,648x = 8,742,780 × 8,742,780
4. Step 4: Simplify right side
   4,203,648x = 76,436,202,128,400
5. Step 5: Solve for x
   x = 76,436,202,128,400/4,203,648
6. Step 6: Final answer
   x = 18,183,302.25