Finding the Third Proportional to 9,879.47 and 20,662.59

Step by Step Solution

1. Step 1: Write the proportion equation
   9,879.47 : 20,662.59 = 20,662.59 : x
2. Step 2: Convert to fraction form
   9,879.47/20,662.59 = 20,662.59/x
3. Step 3: Cross multiply
   9,879.47x = 20,662.59 × 20,662.59
4. Step 4: Simplify right side
   9,879.47x = 426,942,780.48
5. Step 5: Solve for x
   x = 426,942,780.48/9,879.47
6. Step 6: Final answer
   x = 43,215.16