Finding the Fourth Proportional to 13,145.56, 18,140.10 and 7,556.56

Step by Step Solution

1. Step 1: Write the proportion equation
   13,145.56 : 18,140.10 = 7,556.56 : x
2. Step 2: Convert to fraction form
   13,145.56/18,140.10 = 7,556.56/x
3. Step 3: Cross multiply
   13,145.56x = 18,140.10 × 7,556.56
4. Step 4: Simplify right side
   13,145.56x = 137,076,754.06
5. Step 5: Solve for x
   x = 137,076,754.06/13,145.56
6. Step 6: Final answer
   x = 10,427.61