Finding the Fourth Proportional to 21,996.91, 30,357.35 and 12,565.27

Step by Step Solution

1. Step 1: Write the proportion equation
   21,996.91 : 30,357.35 = 12,565.27 : x
2. Step 2: Convert to fraction form
   21,996.91/30,357.35 = 12,565.27/x
3. Step 3: Cross multiply
   21,996.91x = 30,357.35 × 12,565.27
4. Step 4: Simplify right side
   21,996.91x = 381,448,236.41
5. Step 5: Solve for x
   x = 381,448,236.41/21,996.91
6. Step 6: Final answer
   x = 17,340.99