Finding the Fourth Proportional to 5,660.56, 7,808.46 and 3,981.28

Step by Step Solution

1. Step 1: Write the proportion equation
   5,660.56 : 7,808.46 = 3,981.28 : x
2. Step 2: Convert to fraction form
   5,660.56/7,808.46 = 3,981.28/x
3. Step 3: Cross multiply
   5,660.56x = 7,808.46 × 3,981.28
4. Step 4: Simplify right side
   5,660.56x = 31,087,665.63
5. Step 5: Solve for x
   x = 31,087,665.63/5,660.56
6. Step 6: Final answer
   x = 5,491.98