Finding the Fourth Proportional to 21,154.05, 31,727.52 and 7,112.49

Step by Step Solution

1. Step 1: Write the proportion equation
   21,154.05 : 31,727.52 = 7,112.49 : x
2. Step 2: Convert to fraction form
   21,154.05/31,727.52 = 7,112.49/x
3. Step 3: Cross multiply
   21,154.05x = 31,727.52 × 7,112.49
4. Step 4: Simplify right side
   21,154.05x = 225,661,668.72
5. Step 5: Solve for x
   x = 225,661,668.72/21,154.05
6. Step 6: Final answer
   x = 10,667.54