Finding the Fourth Proportional to 12,488.54, 18,723.56 and 7,556.98

Step by Step Solution

1. Step 1: Write the proportion equation
   12,488.54 : 18,723.56 = 7,556.98 : x
2. Step 2: Convert to fraction form
   12,488.54/18,723.56 = 7,556.98/x
3. Step 3: Cross multiply
   12,488.54x = 18,723.56 × 7,556.98
4. Step 4: Simplify right side
   12,488.54x = 141,493,568.45
5. Step 5: Solve for x
   x = 141,493,568.45/12,488.54
6. Step 6: Final answer
   x = 11,329.87