Finding the Fourth Proportional to 13,222.56, 18,245.98 and 7,556.19

Step by Step Solution

1. Step 1: Write the proportion equation
   13,222.56 : 18,245.98 = 7,556.19 : x
2. Step 2: Convert to fraction form
   13,222.56/18,245.98 = 7,556.19/x
3. Step 3: Cross multiply
   13,222.56x = 18,245.98 × 7,556.19
4. Step 4: Simplify right side
   13,222.56x = 137,870,091.62
5. Step 5: Solve for x
   x = 137,870,091.62/13,222.56
6. Step 6: Final answer
   x = 10,426.88