Finding the Fourth Proportional to 13,143.56, 18,137.34 and 7,554.56

Step by Step Solution

1. Step 1: Write the proportion equation
   13,143.56 : 18,137.34 = 7,554.56 : x
2. Step 2: Convert to fraction form
   13,143.56/18,137.34 = 7,554.56/x
3. Step 3: Cross multiply
   13,143.56x = 18,137.34 × 7,554.56
4. Step 4: Simplify right side
   13,143.56x = 137,019,623.27
5. Step 5: Solve for x
   x = 137,019,623.27/13,143.56
6. Step 6: Final answer
   x = 10,424.85