Finding the Fourth Proportional to 15,843.98, 21,826.56 and 13,326.14

Step by Step Solution

1. Step 1: Write the proportion equation
   15,843.98 : 21,826.56 = 13,326.14 : x
2. Step 2: Convert to fraction form
   15,843.98/21,826.56 = 13,326.14/x
3. Step 3: Cross multiply
   15,843.98x = 21,826.56 × 13,326.14
4. Step 4: Simplify right side
   15,843.98x = 290,863,794.28
5. Step 5: Solve for x
   x = 290,863,794.28/15,843.98
6. Step 6: Final answer
   x = 18,358.00