Finding the Fourth Proportional to 3,399.09, 5,099.10 and 1,059.30

Step by Step Solution

1. Step 1: Write the proportion equation
   3,399.09 : 5,099.10 = 1,059.30 : x
2. Step 2: Convert to fraction form
   3,399.09/5,099.10 = 1,059.30/x
3. Step 3: Cross multiply
   3,399.09x = 5,099.10 × 1,059.30
4. Step 4: Simplify right side
   3,399.09x = 5,401,476.63
5. Step 5: Solve for x
   x = 5,401,476.63/3,399.09
6. Step 6: Final answer
   x = 1,589.09