Finding the Fourth Proportional to 3,139.48, 4,709.34 and 1,059.33

Step by Step Solution

1. Step 1: Write the proportion equation
   3,139.48 : 4,709.34 = 1,059.33 : x
2. Step 2: Convert to fraction form
   3,139.48/4,709.34 = 1,059.33/x
3. Step 3: Cross multiply
   3,139.48x = 4,709.34 × 1,059.33
4. Step 4: Simplify right side
   3,139.48x = 4,988,736.31
5. Step 5: Solve for x
   x = 4,988,736.31/3,139.48
6. Step 6: Final answer
   x = 1,589.03