Finding the Fourth Proportional to 21,751.23, 30,016.17 and 12,799.29

Step by Step Solution

1. Step 1: Write the proportion equation
   21,751.23 : 30,016.17 = 12,799.29 : x
2. Step 2: Convert to fraction form
   21,751.23/30,016.17 = 12,799.29/x
3. Step 3: Cross multiply
   21,751.23x = 30,016.17 × 12,799.29
4. Step 4: Simplify right side
   21,751.23x = 384,185,664.52
5. Step 5: Solve for x
   x = 384,185,664.52/21,751.23
6. Step 6: Final answer
   x = 17,662.71