Finding the Fourth Proportional to 13,016.56, 17,960.93 and 7,351.21

Step by Step Solution

1. Step 1: Write the proportion equation
   13,016.56 : 17,960.93 = 7,351.21 : x
2. Step 2: Convert to fraction form
   13,016.56/17,960.93 = 7,351.21/x
3. Step 3: Cross multiply
   13,016.56x = 17,960.93 × 7,351.21
4. Step 4: Simplify right side
   13,016.56x = 132,034,470.12
5. Step 5: Solve for x
   x = 132,034,470.12/13,016.56
6. Step 6: Final answer
   x = 10,143.58