Finding the Fourth Proportional to 13,104.89, 18,082.35 and 7,439.87

Step by Step Solution

1. Step 1: Write the proportion equation
   13,104.89 : 18,082.35 = 7,439.87 : x
2. Step 2: Convert to fraction form
   13,104.89/18,082.35 = 7,439.87/x
3. Step 3: Cross multiply
   13,104.89x = 18,082.35 × 7,439.87
4. Step 4: Simplify right side
   13,104.89x = 134,530,333.29
5. Step 5: Solve for x
   x = 134,530,333.29/13,104.89
6. Step 6: Final answer
   x = 10,265.66