Finding the Fourth Proportional to 21,804.74, 30,096.33 and 13,428.26

Step by Step Solution

1. Step 1: Write the proportion equation
   21,804.74 : 30,096.33 = 13,428.26 : x
2. Step 2: Convert to fraction form
   21,804.74/30,096.33 = 13,428.26/x
3. Step 3: Cross multiply
   21,804.74x = 30,096.33 × 13,428.26
4. Step 4: Simplify right side
   21,804.74x = 404,141,344.29
5. Step 5: Solve for x
   x = 404,141,344.29/21,804.74
6. Step 6: Final answer
   x = 18,534.56