Finding the Fourth Proportional to 21,928.56, 30,261.24 and 12,496.56

Step by Step Solution

1. Step 1: Write the proportion equation
   21,928.56 : 30,261.24 = 12,496.56 : x
2. Step 2: Convert to fraction form
   21,928.56/30,261.24 = 12,496.56/x
3. Step 3: Cross multiply
   21,928.56x = 30,261.24 × 12,496.56
4. Step 4: Simplify right side
   21,928.56x = 378,161,401.33
5. Step 5: Solve for x
   x = 378,161,401.33/21,928.56
6. Step 6: Final answer
   x = 17,245.15