Finding the Fourth Proportional to 3,427.59, 5,139.39 and 1,087.12

Step by Step Solution

1. Step 1: Write the proportion equation
   3,427.59 : 5,139.39 = 1,087.12 : x
2. Step 2: Convert to fraction form
   3,427.59/5,139.39 = 1,087.12/x
3. Step 3: Cross multiply
   3,427.59x = 5,139.39 × 1,087.12
4. Step 4: Simplify right side
   3,427.59x = 5,587,133.66
5. Step 5: Solve for x
   x = 5,587,133.66/3,427.59
6. Step 6: Final answer
   x = 1,630.05