Finding the Fourth Proportional to 21,196.31, 29,251.02 and 13,243.14

Step by Step Solution

1. Step 1: Write the proportion equation
   21,196.31 : 29,251.02 = 13,243.14 : x
2. Step 2: Convert to fraction form
   21,196.31/29,251.02 = 13,243.14/x
3. Step 3: Cross multiply
   21,196.31x = 29,251.02 × 13,243.14
4. Step 4: Simplify right side
   21,196.31x = 387,375,359.91
5. Step 5: Solve for x
   x = 387,375,359.91/21,196.31
6. Step 6: Final answer
   x = 18,275.61