Finding the Fourth Proportional to 21,796.41, 30,078.77 and 12,844.29

Step by Step Solution

1. Step 1: Write the proportion equation
   21,796.41 : 30,078.77 = 12,844.29 : x
2. Step 2: Convert to fraction form
   21,796.41/30,078.77 = 12,844.29/x
3. Step 3: Cross multiply
   21,796.41x = 30,078.77 × 12,844.29
4. Step 4: Simplify right side
   21,796.41x = 386,340,380.50
5. Step 5: Solve for x
   x = 386,340,380.50/21,796.41
6. Step 6: Final answer
   x = 17,724.95