Finding the Third Proportional to 5,215,222 and 8,068,415

Step by Step Solution

1. Step 1: Write the proportion equation
   5,215,222 : 8,068,415 = 8,068,415 : x
2. Step 2: Convert to fraction form
   5,215,222/8,068,415 = 8,068,415/x
3. Step 3: Cross multiply
   5,215,222x = 8,068,415 × 8,068,415
4. Step 4: Simplify right side
   5,215,222x = 65,099,320,612,225
5. Step 5: Solve for x
   x = 65,099,320,612,225/5,215,222
6. Step 6: Final answer
   x = 12,482,559.82