Finding the Third Proportional to 5,678,714 and 8,509,287

Step by Step Solution

1. Step 1: Write the proportion equation
   5,678,714 : 8,509,287 = 8,509,287 : x
2. Step 2: Convert to fraction form
   5,678,714/8,509,287 = 8,509,287/x
3. Step 3: Cross multiply
   5,678,714x = 8,509,287 × 8,509,287
4. Step 4: Simplify right side
   5,678,714x = 72,407,965,248,369
5. Step 5: Solve for x
   x = 72,407,965,248,369/5,678,714
6. Step 6: Final answer
   x = 12,750,768.09