Finding the Fourth Proportional to 21,818.82, 30,109.14 and 13,335.14

Step by Step Solution

1. Step 1: Write the proportion equation
   21,818.82 : 30,109.14 = 13,335.14 : x
2. Step 2: Convert to fraction form
   21,818.82/30,109.14 = 13,335.14/x
3. Step 3: Cross multiply
   21,818.82x = 30,109.14 × 13,335.14
4. Step 4: Simplify right side
   21,818.82x = 401,509,446.63
5. Step 5: Solve for x
   x = 401,509,446.63/21,818.82
6. Step 6: Final answer
   x = 18,401.98