Finding the Fourth Proportional to 12,322.26, 18,477.90 and 3,555.09

Step by Step Solution

1. Step 1: Write the proportion equation
   12,322.26 : 18,477.90 = 3,555.09 : x
2. Step 2: Convert to fraction form
   12,322.26/18,477.90 = 3,555.09/x
3. Step 3: Cross multiply
   12,322.26x = 18,477.90 × 3,555.09
4. Step 4: Simplify right side
   12,322.26x = 65,690,597.51
5. Step 5: Solve for x
   x = 65,690,597.51/12,322.26
6. Step 6: Final answer
   x = 5,331.05