Finding the Fourth Proportional to 13,016.72, 19,481.88 and 10,401.68

Step by Step Solution

1. Step 1: Write the proportion equation
   13,016.72 : 19,481.88 = 10,401.68 : x
2. Step 2: Convert to fraction form
   13,016.72/19,481.88 = 10,401.68/x
3. Step 3: Cross multiply
   13,016.72x = 19,481.88 × 10,401.68
4. Step 4: Simplify right side
   13,016.72x = 202,644,281.56
5. Step 5: Solve for x
   x = 202,644,281.56/13,016.72
6. Step 6: Final answer
   x = 15,568.00