Finding the Fourth Proportional to 19,896.57, 27,468.72 and 13,855.59

Step by Step Solution

1. Step 1: Write the proportion equation
   19,896.57 : 27,468.72 = 13,855.59 : x
2. Step 2: Convert to fraction form
   19,896.57/27,468.72 = 13,855.59/x
3. Step 3: Cross multiply
   19,896.57x = 27,468.72 × 13,855.59
4. Step 4: Simplify right side
   19,896.57x = 380,595,322.14
5. Step 5: Solve for x
   x = 380,595,322.14/19,896.57
6. Step 6: Final answer
   x = 19,128.69