Finding the Fourth Proportional to 3,425.82, 5,139.27 and 1,085.28

Step by Step Solution

1. Step 1: Write the proportion equation
   3,425.82 : 5,139.27 = 1,085.28 : x
2. Step 2: Convert to fraction form
   3,425.82/5,139.27 = 1,085.28/x
3. Step 3: Cross multiply
   3,425.82x = 5,139.27 × 1,085.28
4. Step 4: Simplify right side
   3,425.82x = 5,577,546.95
5. Step 5: Solve for x
   x = 5,577,546.95/3,425.82
6. Step 6: Final answer
   x = 1,628.09