Finding the Third Proportional to 3,986,829 and 8,540,118

Step by Step Solution

1. Step 1: Write the proportion equation
   3,986,829 : 8,540,118 = 8,540,118 : x
2. Step 2: Convert to fraction form
   3,986,829/8,540,118 = 8,540,118/x
3. Step 3: Cross multiply
   3,986,829x = 8,540,118 × 8,540,118
4. Step 4: Simplify right side
   3,986,829x = 72,933,615,453,924
5. Step 5: Solve for x
   x = 72,933,615,453,924/3,986,829
6. Step 6: Final answer
   x = 18,293,640.25