Finding the Fourth Proportional to 21,760.94, 30,022.71 and 12,805.58

Step by Step Solution

1. Step 1: Write the proportion equation
   21,760.94 : 30,022.71 = 12,805.58 : x
2. Step 2: Convert to fraction form
   21,760.94/30,022.71 = 12,805.58/x
3. Step 3: Cross multiply
   21,760.94x = 30,022.71 × 12,805.58
4. Step 4: Simplify right side
   21,760.94x = 384,458,214.72
5. Step 5: Solve for x
   x = 384,458,214.72/21,760.94
6. Step 6: Final answer
   x = 17,667.35