Finding the Third Proportional to 5,398,616 and 8,278,362

Step by Step Solution

1. Step 1: Write the proportion equation
   5,398,616 : 8,278,362 = 8,278,362 : x
2. Step 2: Convert to fraction form
   5,398,616/8,278,362 = 8,278,362/x
3. Step 3: Cross multiply
   5,398,616x = 8,278,362 × 8,278,362
4. Step 4: Simplify right side
   5,398,616x = 68,531,277,403,044
5. Step 5: Solve for x
   x = 68,531,277,403,044/5,398,616
6. Step 6: Final answer
   x = 12,694,230.78