Finding the Fourth Proportional to 21,796.04, 30,078.10 and 12,236.16

Step by Step Solution

1. Step 1: Write the proportion equation
   21,796.04 : 30,078.10 = 12,236.16 : x
2. Step 2: Convert to fraction form
   21,796.04/30,078.10 = 12,236.16/x
3. Step 3: Cross multiply
   21,796.04x = 30,078.10 × 12,236.16
4. Step 4: Simplify right side
   21,796.04x = 368,040,444.10
5. Step 5: Solve for x
   x = 368,040,444.10/21,796.04
6. Step 6: Final answer
   x = 16,885.66