Finding the Fourth Proportional to 3,439.05, 5,158.86 and 1,099.40

Step by Step Solution

1. Step 1: Write the proportion equation
   3,439.05 : 5,158.86 = 1,099.40 : x
2. Step 2: Convert to fraction form
   3,439.05/5,158.86 = 1,099.40/x
3. Step 3: Cross multiply
   3,439.05x = 5,158.86 × 1,099.40
4. Step 4: Simplify right side
   3,439.05x = 5,671,624.89
5. Step 5: Solve for x
   x = 5,671,624.89/3,439.05
6. Step 6: Final answer
   x = 1,649.18