Finding the Fourth Proportional to 21,443.08, 29,581.56 and 13,891.94

Step by Step Solution

1. Step 1: Write the proportion equation
   21,443.08 : 29,581.56 = 13,891.94 : x
2. Step 2: Convert to fraction form
   21,443.08/29,581.56 = 13,891.94/x
3. Step 3: Cross multiply
   21,443.08x = 29,581.56 × 13,891.94
4. Step 4: Simplify right side
   21,443.08x = 410,945,256.63
5. Step 5: Solve for x
   x = 410,945,256.63/21,443.08
6. Step 6: Final answer
   x = 19,164.47