Finding the Fourth Proportional to 12,072.28, 18,106.32 and 3,305.10

Step by Step Solution

1. Step 1: Write the proportion equation
   12,072.28 : 18,106.32 = 3,305.10 : x
2. Step 2: Convert to fraction form
   12,072.28/18,106.32 = 3,305.10/x
3. Step 3: Cross multiply
   12,072.28x = 18,106.32 × 3,305.10
4. Step 4: Simplify right side
   12,072.28x = 59,843,198.23
5. Step 5: Solve for x
   x = 59,843,198.23/12,072.28
6. Step 6: Final answer
   x = 4,957.08