Finding the Fourth Proportional to 20,131.62, 27,794.79 and 13,078.14

Step by Step Solution

1. Step 1: Write the proportion equation
   20,131.62 : 27,794.79 = 13,078.14 : x
2. Step 2: Convert to fraction form
   20,131.62/27,794.79 = 13,078.14/x
3. Step 3: Cross multiply
   20,131.62x = 27,794.79 × 13,078.14
4. Step 4: Simplify right side
   20,131.62x = 363,504,154.89
5. Step 5: Solve for x
   x = 363,504,154.89/20,131.62
6. Step 6: Final answer
   x = 18,056.38