Finding the Fourth Proportional to 21,105.96, 29,127.72 and 11,674.32

Step by Step Solution

1. Step 1: Write the proportion equation
   21,105.96 : 29,127.72 = 11,674.32 : x
2. Step 2: Convert to fraction form
   21,105.96/29,127.72 = 11,674.32/x
3. Step 3: Cross multiply
   21,105.96x = 29,127.72 × 11,674.32
4. Step 4: Simplify right side
   21,105.96x = 340,046,324.15
5. Step 5: Solve for x
   x = 340,046,324.15/21,105.96
6. Step 6: Final answer
   x = 16,111.39