Finding the Fourth Proportional to 21,814.86, 30,103.71 and 13,331.18

Step by Step Solution

1. Step 1: Write the proportion equation
   21,814.86 : 30,103.71 = 13,331.18 : x
2. Step 2: Convert to fraction form
   21,814.86/30,103.71 = 13,331.18/x
3. Step 3: Cross multiply
   21,814.86x = 30,103.71 × 13,331.18
4. Step 4: Simplify right side
   21,814.86x = 401,317,976.68
5. Step 5: Solve for x
   x = 401,317,976.68/21,814.86
6. Step 6: Final answer
   x = 18,396.54