Finding the Fourth Proportional to 3,439.31, 5,158.89 and 1,099.29

Step by Step Solution

1. Step 1: Write the proportion equation
   3,439.31 : 5,158.89 = 1,099.29 : x
2. Step 2: Convert to fraction form
   3,439.31/5,158.89 = 1,099.29/x
3. Step 3: Cross multiply
   3,439.31x = 5,158.89 × 1,099.29
4. Step 4: Simplify right side
   3,439.31x = 5,671,116.19
5. Step 5: Solve for x
   x = 5,671,116.19/3,439.31
6. Step 6: Final answer
   x = 1,648.91