Finding the Third Proportional to 3,879,306 and 8,430,102

Step by Step Solution

1. Step 1: Write the proportion equation
   3,879,306 : 8,430,102 = 8,430,102 : x
2. Step 2: Convert to fraction form
   3,879,306/8,430,102 = 8,430,102/x
3. Step 3: Cross multiply
   3,879,306x = 8,430,102 × 8,430,102
4. Step 4: Simplify right side
   3,879,306x = 71,066,619,730,404
5. Step 5: Solve for x
   x = 71,066,619,730,404/3,879,306
6. Step 6: Final answer
   x = 18,319,415.83