Finding the Fourth Proportional to 21,119.56, 31,672.05 and 10,018.71

Step by Step Solution

1. Step 1: Write the proportion equation
   21,119.56 : 31,672.05 = 10,018.71 : x
2. Step 2: Convert to fraction form
   21,119.56/31,672.05 = 10,018.71/x
3. Step 3: Cross multiply
   21,119.56x = 31,672.05 × 10,018.71
4. Step 4: Simplify right side
   21,119.56x = 317,313,046.49
5. Step 5: Solve for x
   x = 317,313,046.49/21,119.56
6. Step 6: Final answer
   x = 15,024.61