Finding the Fourth Proportional to 21,774.69, 30,049.39 and 12,216.69

Step by Step Solution

1. Step 1: Write the proportion equation
   21,774.69 : 30,049.39 = 12,216.69 : x
2. Step 2: Convert to fraction form
   21,774.69/30,049.39 = 12,216.69/x
3. Step 3: Cross multiply
   21,774.69x = 30,049.39 × 12,216.69
4. Step 4: Simplify right side
   21,774.69x = 367,104,082.32
5. Step 5: Solve for x
   x = 367,104,082.32/21,774.69
6. Step 6: Final answer
   x = 16,859.21