Finding the Fourth Proportional to 20,540.93, 30,771.41 and 13,499.70

Step by Step Solution

1. Step 1: Write the proportion equation
   20,540.93 : 30,771.41 = 13,499.70 : x
2. Step 2: Convert to fraction form
   20,540.93/30,771.41 = 13,499.70/x
3. Step 3: Cross multiply
   20,540.93x = 30,771.41 × 13,499.70
4. Step 4: Simplify right side
   20,540.93x = 415,404,620.69
5. Step 5: Solve for x
   x = 415,404,620.69/20,540.93
6. Step 6: Final answer
   x = 20,223.27