Finding the Third Proportional to 4,172,022 and 8,663,789.25

Step by Step Solution

1. Step 1: Write the proportion equation
   4,172,022 : 8,663,789.25 = 8,663,789.25 : x
2. Step 2: Convert to fraction form
   4,172,022/8,663,789.25 = 8,663,789.25/x
3. Step 3: Cross multiply
   4,172,022x = 8,663,789.25 × 8,663,789.25
4. Step 4: Simplify right side
   4,172,022x = 75,061,244,168,415.56
5. Step 5: Solve for x
   x = 75,061,244,168,415.56/4,172,022
6. Step 6: Final answer
   x = 17,991,574.39