Finding the Fourth Proportional to 13,411.56, 18,507.76 and 7,443.21

Step by Step Solution

1. Step 1: Write the proportion equation
   13,411.56 : 18,507.76 = 7,443.21 : x
2. Step 2: Convert to fraction form
   13,411.56/18,507.76 = 7,443.21/x
3. Step 3: Cross multiply
   13,411.56x = 18,507.76 × 7,443.21
4. Step 4: Simplify right side
   13,411.56x = 137,757,144.31
5. Step 5: Solve for x
   x = 137,757,144.31/13,411.56
6. Step 6: Final answer
   x = 10,271.52