Finding the Fourth Proportional to 12,003.28, 18,005.60 and 3,238.88

Step by Step Solution

1. Step 1: Write the proportion equation
   12,003.28 : 18,005.60 = 3,238.88 : x
2. Step 2: Convert to fraction form
   12,003.28/18,005.60 = 3,238.88/x
3. Step 3: Cross multiply
   12,003.28x = 18,005.60 × 3,238.88
4. Step 4: Simplify right side
   12,003.28x = 58,317,895.80
5. Step 5: Solve for x
   x = 58,317,895.80/12,003.28
6. Step 6: Final answer
   x = 4,858.50