Finding the Fourth Proportional to 21,227.05, 29,292.72 and 12,152.11

Step by Step Solution

1. Step 1: Write the proportion equation
   21,227.05 : 29,292.72 = 12,152.11 : x
2. Step 2: Convert to fraction form
   21,227.05/29,292.72 = 12,152.11/x
3. Step 3: Cross multiply
   21,227.05x = 29,292.72 × 12,152.11
4. Step 4: Simplify right side
   21,227.05x = 355,968,148.42
5. Step 5: Solve for x
   x = 355,968,148.42/21,227.05
6. Step 6: Final answer
   x = 16,769.55