Finding the Fourth Proportional to 13,411.53, 18,507.94 and 7,443.20

Step by Step Solution

1. Step 1: Write the proportion equation
   13,411.53 : 18,507.94 = 7,443.20 : x
2. Step 2: Convert to fraction form
   13,411.53/18,507.94 = 7,443.20/x
3. Step 3: Cross multiply
   13,411.53x = 18,507.94 × 7,443.20
4. Step 4: Simplify right side
   13,411.53x = 137,758,326.67
5. Step 5: Solve for x
   x = 137,758,326.67/13,411.53
6. Step 6: Final answer
   x = 10,271.63