Finding the Fourth Proportional to 5,439.56, 8,155.49 and 3,680.24

Step by Step Solution

1. Step 1: Write the proportion equation
   5,439.56 : 8,155.49 = 3,680.24 : x
2. Step 2: Convert to fraction form
   5,439.56/8,155.49 = 3,680.24/x
3. Step 3: Cross multiply
   5,439.56x = 8,155.49 × 3,680.24
4. Step 4: Simplify right side
   5,439.56x = 30,014,101.34
5. Step 5: Solve for x
   x = 30,014,101.34/5,439.56
6. Step 6: Final answer
   x = 5,517.75