Finding the Fourth Proportional to 21,037.52, 29,030.81 and 12,078.72

Step by Step Solution

1. Step 1: Write the proportion equation
   21,037.52 : 29,030.81 = 12,078.72 : x
2. Step 2: Convert to fraction form
   21,037.52/29,030.81 = 12,078.72/x
3. Step 3: Cross multiply
   21,037.52x = 29,030.81 × 12,078.72
4. Step 4: Simplify right side
   21,037.52x = 350,654,964.97
5. Step 5: Solve for x
   x = 350,654,964.97/21,037.52
6. Step 6: Final answer
   x = 16,668.07