Finding the Fourth Proportional to 12,322.32, 18,485.30 and 3,557.31

Step by Step Solution

1. Step 1: Write the proportion equation
   12,322.32 : 18,485.30 = 3,557.31 : x
2. Step 2: Convert to fraction form
   12,322.32/18,485.30 = 3,557.31/x
3. Step 3: Cross multiply
   12,322.32x = 18,485.30 × 3,557.31
4. Step 4: Simplify right side
   12,322.32x = 65,757,942.54
5. Step 5: Solve for x
   x = 65,757,942.54/12,322.32
6. Step 6: Final answer
   x = 5,336.49