Finding the Fourth Proportional to 21,096.33, 29,113.01 and 12,143.67

Step by Step Solution

1. Step 1: Write the proportion equation
   21,096.33 : 29,113.01 = 12,143.67 : x
2. Step 2: Convert to fraction form
   21,096.33/29,113.01 = 12,143.67/x
3. Step 3: Cross multiply
   21,096.33x = 29,113.01 × 12,143.67
4. Step 4: Simplify right side
   21,096.33x = 353,538,725.43
5. Step 5: Solve for x
   x = 353,538,725.43/21,096.33
6. Step 6: Final answer
   x = 16,758.30