Finding the Fourth Proportional to 3,320.39, 4,981.30 and 1,099.10

Step by Step Solution

1. Step 1: Write the proportion equation
   3,320.39 : 4,981.30 = 1,099.10 : x
2. Step 2: Convert to fraction form
   3,320.39/4,981.30 = 1,099.10/x
3. Step 3: Cross multiply
   3,320.39x = 4,981.30 × 1,099.10
4. Step 4: Simplify right side
   3,320.39x = 5,474,956.54
5. Step 5: Solve for x
   x = 5,474,956.54/3,320.39
6. Step 6: Final answer
   x = 1,648.89