Finding the Fourth Proportional to 19,939.91, 27,516.42 and 10,987.38

Step by Step Solution

1. Step 1: Write the proportion equation
   19,939.91 : 27,516.42 = 10,987.38 : x
2. Step 2: Convert to fraction form
   19,939.91/27,516.42 = 10,987.38/x
3. Step 3: Cross multiply
   19,939.91x = 27,516.42 × 10,987.38
4. Step 4: Simplify right side
   19,939.91x = 302,333,362.78
5. Step 5: Solve for x
   x = 302,333,362.78/19,939.91
6. Step 6: Final answer
   x = 15,162.23