Finding the Fourth Proportional to 3,425.51, 5,139.73 and 1,085.71

Step by Step Solution

1. Step 1: Write the proportion equation
   3,425.51 : 5,139.73 = 1,085.71 : x
2. Step 2: Convert to fraction form
   3,425.51/5,139.73 = 1,085.71/x
3. Step 3: Cross multiply
   3,425.51x = 5,139.73 × 1,085.71
4. Step 4: Simplify right side
   3,425.51x = 5,580,256.26
5. Step 5: Solve for x
   x = 5,580,256.26/3,425.51
6. Step 6: Final answer
   x = 1,629.03