Finding the Fourth Proportional to 13,411.58, 18,507.70 and 7,443.20

Step by Step Solution

1. Step 1: Write the proportion equation
   13,411.58 : 18,507.70 = 7,443.20 : x
2. Step 2: Convert to fraction form
   13,411.58/18,507.70 = 7,443.20/x
3. Step 3: Cross multiply
   13,411.58x = 18,507.70 × 7,443.20
4. Step 4: Simplify right side
   13,411.58x = 137,756,512.64
5. Step 5: Solve for x
   x = 137,756,512.64/13,411.58
6. Step 6: Final answer
   x = 10,271.46