Finding the Fourth Proportional to 21,162.02, 29,196.06 and 12,211.79

Step by Step Solution

1. Step 1: Write the proportion equation
   21,162.02 : 29,196.06 = 12,211.79 : x
2. Step 2: Convert to fraction form
   21,162.02/29,196.06 = 12,211.79/x
3. Step 3: Cross multiply
   21,162.02x = 29,196.06 × 12,211.79
4. Step 4: Simplify right side
   21,162.02x = 356,536,153.55
5. Step 5: Solve for x
   x = 356,536,153.55/21,162.02
6. Step 6: Final answer
   x = 16,847.93