Finding the Fourth Proportional to 21,800.18, 30,087.54 and 13,307.24

Step by Step Solution

1. Step 1: Write the proportion equation
   21,800.18 : 30,087.54 = 13,307.24 : x
2. Step 2: Convert to fraction form
   21,800.18/30,087.54 = 13,307.24/x
3. Step 3: Cross multiply
   21,800.18x = 30,087.54 × 13,307.24
4. Step 4: Simplify right side
   21,800.18x = 400,382,191.01
5. Step 5: Solve for x
   x = 400,382,191.01/21,800.18
6. Step 6: Final answer
   x = 18,366.00