Finding the Fourth Proportional to 21,816.07, 30,105.35 and 13,332.38

Step by Step Solution

1. Step 1: Write the proportion equation
   21,816.07 : 30,105.35 = 13,332.38 : x
2. Step 2: Convert to fraction form
   21,816.07/30,105.35 = 13,332.38/x
3. Step 3: Cross multiply
   21,816.07x = 30,105.35 × 13,332.38
4. Step 4: Simplify right side
   21,816.07x = 401,375,966.23
5. Step 5: Solve for x
   x = 401,375,966.23/21,816.07
6. Step 6: Final answer
   x = 18,398.18