Finding the Fourth Proportional to 21,401.37, 29,540.74 and 15,029.50

Step by Step Solution

1. Step 1: Write the proportion equation
   21,401.37 : 29,540.74 = 15,029.50 : x
2. Step 2: Convert to fraction form
   21,401.37/29,540.74 = 15,029.50/x
3. Step 3: Cross multiply
   21,401.37x = 29,540.74 × 15,029.50
4. Step 4: Simplify right side
   21,401.37x = 443,982,551.83
5. Step 5: Solve for x
   x = 443,982,551.83/21,401.37
6. Step 6: Final answer
   x = 20,745.52