Finding the Fourth Proportional to 21,804.55, 30,093.72 and 13,308.52

Step by Step Solution

1. Step 1: Write the proportion equation
   21,804.55 : 30,093.72 = 13,308.52 : x
2. Step 2: Convert to fraction form
   21,804.55/30,093.72 = 13,308.52/x
3. Step 3: Cross multiply
   21,804.55x = 30,093.72 × 13,308.52
4. Step 4: Simplify right side
   21,804.55x = 400,502,874.49
5. Step 5: Solve for x
   x = 400,502,874.49/21,804.55
6. Step 6: Final answer
   x = 18,367.86