Finding the Fourth Proportional to 21,096.18, 29,111.49 and 12,142.26

Step by Step Solution

1. Step 1: Write the proportion equation
   21,096.18 : 29,111.49 = 12,142.26 : x
2. Step 2: Convert to fraction form
   21,096.18/29,111.49 = 12,142.26/x
3. Step 3: Cross multiply
   21,096.18x = 29,111.49 × 12,142.26
4. Step 4: Simplify right side
   21,096.18x = 353,479,280.57
5. Step 5: Solve for x
   x = 353,479,280.57/21,096.18
6. Step 6: Final answer
   x = 16,755.61