Finding the Third Proportional to 4,172,011 and 8,663,762

Step by Step Solution

1. Step 1: Write the proportion equation
   4,172,011 : 8,663,762 = 8,663,762 : x
2. Step 2: Convert to fraction form
   4,172,011/8,663,762 = 8,663,762/x
3. Step 3: Cross multiply
   4,172,011x = 8,663,762 × 8,663,762
4. Step 4: Simplify right side
   4,172,011x = 75,060,771,992,644
5. Step 5: Solve for x
   x = 75,060,771,992,644/4,172,011
6. Step 6: Final answer
   x = 17,991,508.65