Finding the Third Proportional to 5,398,614 and 8,278,359

Step by Step Solution

1. Step 1: Write the proportion equation
   5,398,614 : 8,278,359 = 8,278,359 : x
2. Step 2: Convert to fraction form
   5,398,614/8,278,359 = 8,278,359/x
3. Step 3: Cross multiply
   5,398,614x = 8,278,359 × 8,278,359
4. Step 4: Simplify right side
   5,398,614x = 68,531,227,732,881
5. Step 5: Solve for x
   x = 68,531,227,732,881/5,398,614
6. Step 6: Final answer
   x = 12,694,226.28