Finding the Fourth Proportional to 3,439.79, 5,158.10 and 1,099.34

Step by Step Solution

1. Step 1: Write the proportion equation
   3,439.79 : 5,158.10 = 1,099.34 : x
2. Step 2: Convert to fraction form
   3,439.79/5,158.10 = 1,099.34/x
3. Step 3: Cross multiply
   3,439.79x = 5,158.10 × 1,099.34
4. Step 4: Simplify right side
   3,439.79x = 5,670,482.61
5. Step 5: Solve for x
   x = 5,670,482.61/3,439.79
6. Step 6: Final answer
   x = 1,648.50