Finding the Fourth Proportional to 6,480.72, 8,944.20 and 3,687.12

Step by Step Solution

1. Step 1: Write the proportion equation
   6,480.72 : 8,944.20 = 3,687.12 : x
2. Step 2: Convert to fraction form
   6,480.72/8,944.20 = 3,687.12/x
3. Step 3: Cross multiply
   6,480.72x = 8,944.20 × 3,687.12
4. Step 4: Simplify right side
   6,480.72x = 32,978,338.70
5. Step 5: Solve for x
   x = 32,978,338.70/6,480.72
6. Step 6: Final answer
   x = 5,088.68