Finding the Fourth Proportional to 20,521.94, 30,796.78 and 8,040.42

Step by Step Solution

1. Step 1: Write the proportion equation
   20,521.94 : 30,796.78 = 8,040.42 : x
2. Step 2: Convert to fraction form
   20,521.94/30,796.78 = 8,040.42/x
3. Step 3: Cross multiply
   20,521.94x = 30,796.78 × 8,040.42
4. Step 4: Simplify right side
   20,521.94x = 247,619,045.85
5. Step 5: Solve for x
   x = 247,619,045.85/20,521.94
6. Step 6: Final answer
   x = 12,066.06