Finding the Third Proportional to 4,172,014 and 8,663,772

Step by Step Solution

1. Step 1: Write the proportion equation
   4,172,014 : 8,663,772 = 8,663,772 : x
2. Step 2: Convert to fraction form
   4,172,014/8,663,772 = 8,663,772/x
3. Step 3: Cross multiply
   4,172,014x = 8,663,772 × 8,663,772
4. Step 4: Simplify right side
   4,172,014x = 75,060,945,267,984
5. Step 5: Solve for x
   x = 75,060,945,267,984/4,172,014
6. Step 6: Final answer
   x = 17,991,537.25