Finding the Fourth Proportional to 21,041.72, 29,041.32 and 12,544.39

Step by Step Solution

1. Step 1: Write the proportion equation
   21,041.72 : 29,041.32 = 12,544.39 : x
2. Step 2: Convert to fraction form
   21,041.72/29,041.32 = 12,544.39/x
3. Step 3: Cross multiply
   21,041.72x = 29,041.32 × 12,544.39
4. Step 4: Simplify right side
   21,041.72x = 364,305,727.54
5. Step 5: Solve for x
   x = 364,305,727.54/21,041.72
6. Step 6: Final answer
   x = 17,313.50