Finding the Fourth Proportional to 12,494.69, 18,650.87 and 10,918.24

Step by Step Solution

1. Step 1: Write the proportion equation
   12,494.69 : 18,650.87 = 10,918.24 : x
2. Step 2: Convert to fraction form
   12,494.69/18,650.87 = 10,918.24/x
3. Step 3: Cross multiply
   12,494.69x = 18,650.87 × 10,918.24
4. Step 4: Simplify right side
   12,494.69x = 203,634,614.59
5. Step 5: Solve for x
   x = 203,634,614.59/12,494.69
6. Step 6: Final answer
   x = 16,297.69