Finding the Fourth Proportional to 16,520.36, 22,786.72 and 13,787.29

Step by Step Solution

1. Step 1: Write the proportion equation
   16,520.36 : 22,786.72 = 13,787.29 : x
2. Step 2: Convert to fraction form
   16,520.36/22,786.72 = 13,787.29/x
3. Step 3: Cross multiply
   16,520.36x = 22,786.72 × 13,787.29
4. Step 4: Simplify right side
   16,520.36x = 314,167,046.72
5. Step 5: Solve for x
   x = 314,167,046.72/16,520.36
6. Step 6: Final answer
   x = 19,016.97