Finding the Fourth Proportional to 21,142.24, 29,176.32 and 11,710.72

Step by Step Solution

1. Step 1: Write the proportion equation
   21,142.24 : 29,176.32 = 11,710.72 : x
2. Step 2: Convert to fraction form
   21,142.24/29,176.32 = 11,710.72/x
3. Step 3: Cross multiply
   21,142.24x = 29,176.32 × 11,710.72
4. Step 4: Simplify right side
   21,142.24x = 341,675,714.15
5. Step 5: Solve for x
   x = 341,675,714.15/21,142.24
6. Step 6: Final answer
   x = 16,160.81