Finding the Fourth Proportional to 21,976.29, 30,327.32 and 13,028.19

Step by Step Solution

1. Step 1: Write the proportion equation
   21,976.29 : 30,327.32 = 13,028.19 : x
2. Step 2: Convert to fraction form
   21,976.29/30,327.32 = 13,028.19/x
3. Step 3: Cross multiply
   21,976.29x = 30,327.32 × 13,028.19
4. Step 4: Simplify right side
   21,976.29x = 395,110,022.01
5. Step 5: Solve for x
   x = 395,110,022.01/21,976.29
6. Step 6: Final answer
   x = 17,978.92