Finding the Fourth Proportional to 21,002.17, 28,982.97 and 12,049.29

Step by Step Solution

1. Step 1: Write the proportion equation
   21,002.17 : 28,982.97 = 12,049.29 : x
2. Step 2: Convert to fraction form
   21,002.17/28,982.97 = 12,049.29/x
3. Step 3: Cross multiply
   21,002.17x = 28,982.97 × 12,049.29
4. Step 4: Simplify right side
   21,002.17x = 349,224,210.59
5. Step 5: Solve for x
   x = 349,224,210.59/21,002.17
6. Step 6: Final answer
   x = 16,628.01