Finding the Fourth Proportional to 3,439.31, 5,158.71 and 1,099.22

Step by Step Solution

1. Step 1: Write the proportion equation
   3,439.31 : 5,158.71 = 1,099.22 : x
2. Step 2: Convert to fraction form
   3,439.31/5,158.71 = 1,099.22/x
3. Step 3: Cross multiply
   3,439.31x = 5,158.71 × 1,099.22
4. Step 4: Simplify right side
   3,439.31x = 5,670,557.21
5. Step 5: Solve for x
   x = 5,670,557.21/3,439.31
6. Step 6: Final answer
   x = 1,648.75