Finding the Fourth Proportional to 21,031.56, 29,003.94 and 13,951.08

Step by Step Solution

1. Step 1: Write the proportion equation
   21,031.56 : 29,003.94 = 13,951.08 : x
2. Step 2: Convert to fraction form
   21,031.56/29,003.94 = 13,951.08/x
3. Step 3: Cross multiply
   21,031.56x = 29,003.94 × 13,951.08
4. Step 4: Simplify right side
   21,031.56x = 404,636,287.26
5. Step 5: Solve for x
   x = 404,636,287.26/21,031.56
6. Step 6: Final answer
   x = 19,239.48