Finding the Fourth Proportional to 13,443.03, 18,548.33 and 8,136.72

Step by Step Solution

1. Step 1: Write the proportion equation
   13,443.03 : 18,548.33 = 8,136.72 : x
2. Step 2: Convert to fraction form
   13,443.03/18,548.33 = 8,136.72/x
3. Step 3: Cross multiply
   13,443.03x = 18,548.33 × 8,136.72
4. Step 4: Simplify right side
   13,443.03x = 150,922,526.99
5. Step 5: Solve for x
   x = 150,922,526.99/13,443.03
6. Step 6: Final answer
   x = 11,226.82