Finding the Fourth Proportional to 21,443.09, 29,591.47 and 13,059.59

Step by Step Solution

1. Step 1: Write the proportion equation
   21,443.09 : 29,591.47 = 13,059.59 : x
2. Step 2: Convert to fraction form
   21,443.09/29,591.47 = 13,059.59/x
3. Step 3: Cross multiply
   21,443.09x = 29,591.47 × 13,059.59
4. Step 4: Simplify right side
   21,443.09x = 386,452,445.03
5. Step 5: Solve for x
   x = 386,452,445.03/21,443.09
6. Step 6: Final answer
   x = 18,022.24