Finding the Fourth Proportional to 13,443.21, 18,530.15 and 10,786.41

Step by Step Solution

1. Step 1: Write the proportion equation
   13,443.21 : 18,530.15 = 10,786.41 : x
2. Step 2: Convert to fraction form
   13,443.21/18,530.15 = 10,786.41/x
3. Step 3: Cross multiply
   13,443.21x = 18,530.15 × 10,786.41
4. Step 4: Simplify right side
   13,443.21x = 199,873,741.33
5. Step 5: Solve for x
   x = 199,873,741.33/13,443.21
6. Step 6: Final answer
   x = 14,868.01