Finding the Fourth Proportional to 21,791.50, 30,072.59 and 21,037.24

Step by Step Solution

1. Step 1: Write the proportion equation
   21,791.50 : 30,072.59 = 21,037.24 : x
2. Step 2: Convert to fraction form
   21,791.50/30,072.59 = 21,037.24/x
3. Step 3: Cross multiply
   21,791.50x = 30,072.59 × 21,037.24
4. Step 4: Simplify right side
   21,791.50x = 632,644,422.88
5. Step 5: Solve for x
   x = 632,644,422.88/21,791.50
6. Step 6: Final answer
   x = 29,031.70