Finding the Fourth Proportional to 21,976.69, 30,329.24 and 13,022.30

Step by Step Solution

1. Step 1: Write the proportion equation
   21,976.69 : 30,329.24 = 13,022.30 : x
2. Step 2: Convert to fraction form
   21,976.69/30,329.24 = 13,022.30/x
3. Step 3: Cross multiply
   21,976.69x = 30,329.24 × 13,022.30
4. Step 4: Simplify right side
   21,976.69x = 394,956,310.41
5. Step 5: Solve for x
   x = 394,956,310.41/21,976.69
6. Step 6: Final answer
   x = 17,971.60