Finding the Fourth Proportional to 21,804.35, 30,093.29 and 13,311.42

Step by Step Solution

1. Step 1: Write the proportion equation
   21,804.35 : 30,093.29 = 13,311.42 : x
2. Step 2: Convert to fraction form
   21,804.35/30,093.29 = 13,311.42/x
3. Step 3: Cross multiply
   21,804.35x = 30,093.29 × 13,311.42
4. Step 4: Simplify right side
   21,804.35x = 400,584,355.81
5. Step 5: Solve for x
   x = 400,584,355.81/21,804.35
6. Step 6: Final answer
   x = 18,371.77