Finding the Fourth Proportional to 21,076.86, 29,083.59 and 11,644.86

Step by Step Solution

1. Step 1: Write the proportion equation
   21,076.86 : 29,083.59 = 11,644.86 : x
2. Step 2: Convert to fraction form
   21,076.86/29,083.59 = 11,644.86/x
3. Step 3: Cross multiply
   21,076.86x = 29,083.59 × 11,644.86
4. Step 4: Simplify right side
   21,076.86x = 338,674,333.85
5. Step 5: Solve for x
   x = 338,674,333.85/21,076.86
6. Step 6: Final answer
   x = 16,068.54