Finding the Fourth Proportional to 13,081.56, 18,047.79 and 8,607.12

Step by Step Solution

1. Step 1: Write the proportion equation
   13,081.56 : 18,047.79 = 8,607.12 : x
2. Step 2: Convert to fraction form
   13,081.56/18,047.79 = 8,607.12/x
3. Step 3: Cross multiply
   13,081.56x = 18,047.79 × 8,607.12
4. Step 4: Simplify right side
   13,081.56x = 155,339,494.26
5. Step 5: Solve for x
   x = 155,339,494.26/13,081.56
6. Step 6: Final answer
   x = 11,874.69