Finding the Third Proportional to 5,398,612 and 8,278,356

Step by Step Solution

1. Step 1: Write the proportion equation
   5,398,612 : 8,278,356 = 8,278,356 : x
2. Step 2: Convert to fraction form
   5,398,612/8,278,356 = 8,278,356/x
3. Step 3: Cross multiply
   5,398,612x = 8,278,356 × 8,278,356
4. Step 4: Simplify right side
   5,398,612x = 68,531,178,062,736
5. Step 5: Solve for x
   x = 68,531,178,062,736/5,398,612
6. Step 6: Final answer
   x = 12,694,221.79