Finding the Fourth Proportional to 21,031.60, 29,029.56 and 14,745.52

Step by Step Solution

1. Step 1: Write the proportion equation
   21,031.60 : 29,029.56 = 14,745.52 : x
2. Step 2: Convert to fraction form
   21,031.60/29,029.56 = 14,745.52/x
3. Step 3: Cross multiply
   21,031.60x = 29,029.56 × 14,745.52
4. Step 4: Simplify right side
   21,031.60x = 428,055,957.57
5. Step 5: Solve for x
   x = 428,055,957.57/21,031.60
6. Step 6: Final answer
   x = 20,352.99