Finding the Fourth Proportional to 6,439.56, 9,660.76 and 3,667.54

Step by Step Solution

1. Step 1: Write the proportion equation
   6,439.56 : 9,660.76 = 3,667.54 : x
2. Step 2: Convert to fraction form
   6,439.56/9,660.76 = 3,667.54/x
3. Step 3: Cross multiply
   6,439.56x = 9,660.76 × 3,667.54
4. Step 4: Simplify right side
   6,439.56x = 35,431,223.73
5. Step 5: Solve for x
   x = 35,431,223.73/6,439.56
6. Step 6: Final answer
   x = 5,502.12