Finding the Third Proportional to 5,644,380 and 8,479,281

Step by Step Solution

1. Step 1: Write the proportion equation
   5,644,380 : 8,479,281 = 8,479,281 : x
2. Step 2: Convert to fraction form
   5,644,380/8,479,281 = 8,479,281/x
3. Step 3: Cross multiply
   5,644,380x = 8,479,281 × 8,479,281
4. Step 4: Simplify right side
   5,644,380x = 71,898,206,276,961
5. Step 5: Solve for x
   x = 71,898,206,276,961/5,644,380
6. Step 6: Final answer
   x = 12,738,016.62