Finding the Fourth Proportional to 12,405.61, 18,609.59 and 4,082.23

Step by Step Solution

1. Step 1: Write the proportion equation
   12,405.61 : 18,609.59 = 4,082.23 : x
2. Step 2: Convert to fraction form
   12,405.61/18,609.59 = 4,082.23/x
3. Step 3: Cross multiply
   12,405.61x = 18,609.59 × 4,082.23
4. Step 4: Simplify right side
   12,405.61x = 75,968,626.59
5. Step 5: Solve for x
   x = 75,968,626.59/12,405.61
6. Step 6: Final answer
   x = 6,123.73