Finding the Fourth Proportional to 21,434.34, 29,578.56 and 12,002.42

Step by Step Solution

1. Step 1: Write the proportion equation
   21,434.34 : 29,578.56 = 12,002.42 : x
2. Step 2: Convert to fraction form
   21,434.34/29,578.56 = 12,002.42/x
3. Step 3: Cross multiply
   21,434.34x = 29,578.56 × 12,002.42
4. Step 4: Simplify right side
   21,434.34x = 355,014,300.12
5. Step 5: Solve for x
   x = 355,014,300.12/21,434.34
6. Step 6: Final answer
   x = 16,562.88