Finding the Third Proportional to 5,380,931 and 8,171,045

Step by Step Solution

1. Step 1: Write the proportion equation
   5,380,931 : 8,171,045 = 8,171,045 : x
2. Step 2: Convert to fraction form
   5,380,931/8,171,045 = 8,171,045/x
3. Step 3: Cross multiply
   5,380,931x = 8,171,045 × 8,171,045
4. Step 4: Simplify right side
   5,380,931x = 66,765,976,392,025
5. Step 5: Solve for x
   x = 66,765,976,392,025/5,380,931
6. Step 6: Final answer
   x = 12,407,885.62