Finding the Fourth Proportional to 21,797.56, 30,079.72 and 12,367.88

Step by Step Solution

1. Step 1: Write the proportion equation
   21,797.56 : 30,079.72 = 12,367.88 : x
2. Step 2: Convert to fraction form
   21,797.56/30,079.72 = 12,367.88/x
3. Step 3: Cross multiply
   21,797.56x = 30,079.72 × 12,367.88
4. Step 4: Simplify right side
   21,797.56x = 372,022,367.39
5. Step 5: Solve for x
   x = 372,022,367.39/21,797.56
6. Step 6: Final answer
   x = 17,067.16