Finding the Fourth Proportional to 21,796.05, 30,087.71 and 18,456.18

Step by Step Solution

1. Step 1: Write the proportion equation
   21,796.05 : 30,087.71 = 18,456.18 : x
2. Step 2: Convert to fraction form
   21,796.05/30,087.71 = 18,456.18/x
3. Step 3: Cross multiply
   21,796.05x = 30,087.71 × 18,456.18
4. Step 4: Simplify right side
   21,796.05x = 555,304,191.55
5. Step 5: Solve for x
   x = 555,304,191.55/21,796.05
6. Step 6: Final answer
   x = 25,477.29