Finding the Fourth Proportional to 20,447.07, 30,662.55 and 7,965.42

Step by Step Solution

1. Step 1: Write the proportion equation
   20,447.07 : 30,662.55 = 7,965.42 : x
2. Step 2: Convert to fraction form
   20,447.07/30,662.55 = 7,965.42/x
3. Step 3: Cross multiply
   20,447.07x = 30,662.55 × 7,965.42
4. Step 4: Simplify right side
   20,447.07x = 244,240,089.02
5. Step 5: Solve for x
   x = 244,240,089.02/20,447.07
6. Step 6: Final answer
   x = 11,944.99