Finding the Third Proportional to 6,158,638 and 8,871,242

Step by Step Solution

1. Step 1: Write the proportion equation
   6,158,638 : 8,871,242 = 8,871,242 : x
2. Step 2: Convert to fraction form
   6,158,638/8,871,242 = 8,871,242/x
3. Step 3: Cross multiply
   6,158,638x = 8,871,242 × 8,871,242
4. Step 4: Simplify right side
   6,158,638x = 78,698,934,622,564
5. Step 5: Solve for x
   x = 78,698,934,622,564/6,158,638
6. Step 6: Final answer
   x = 12,778,626.48