Finding the Fourth Proportional to 13,144.56, 18,138.72 and 7,555.56

Step by Step Solution

1. Step 1: Write the proportion equation
   13,144.56 : 18,138.72 = 7,555.56 : x
2. Step 2: Convert to fraction form
   13,144.56/18,138.72 = 7,555.56/x
3. Step 3: Cross multiply
   13,144.56x = 18,138.72 × 7,555.56
4. Step 4: Simplify right side
   13,144.56x = 137,048,187.28
5. Step 5: Solve for x
   x = 137,048,187.28/13,144.56
6. Step 6: Final answer
   x = 10,426.23