Finding the Fourth Proportional to 3,139.91, 4,710.61 and 1,059.89

Step by Step Solution

1. Step 1: Write the proportion equation
   3,139.91 : 4,710.61 = 1,059.89 : x
2. Step 2: Convert to fraction form
   3,139.91/4,710.61 = 1,059.89/x
3. Step 3: Cross multiply
   3,139.91x = 4,710.61 × 1,059.89
4. Step 4: Simplify right side
   3,139.91x = 4,992,700.24
5. Step 5: Solve for x
   x = 4,992,700.24/3,139.91
6. Step 6: Final answer
   x = 1,590.08