Finding the Third Proportional to 3,909,118 and 8,409,212

Step by Step Solution

1. Step 1: Write the proportion equation
   3,909,118 : 8,409,212 = 8,409,212 : x
2. Step 2: Convert to fraction form
   3,909,118/8,409,212 = 8,409,212/x
3. Step 3: Cross multiply
   3,909,118x = 8,409,212 × 8,409,212
4. Step 4: Simplify right side
   3,909,118x = 70,714,846,460,944
5. Step 5: Solve for x
   x = 70,714,846,460,944/3,909,118
6. Step 6: Final answer
   x = 18,089,719.08