Finding the Fourth Proportional to 21,096.56, 29,115.88 and 12,144

Step by Step Solution

1. Step 1: Write the proportion equation
   21,096.56 : 29,115.88 = 12,144 : x
2. Step 2: Convert to fraction form
   21,096.56/29,115.88 = 12,144/x
3. Step 3: Cross multiply
   21,096.56x = 29,115.88 × 12,144
4. Step 4: Simplify right side
   21,096.56x = 353,583,246.72
5. Step 5: Solve for x
   x = 353,583,246.72/21,096.56
6. Step 6: Final answer
   x = 16,760.23