Finding the Fourth Proportional to 3,427.92, 5,139.50 and 1,087.16

Step by Step Solution

1. Step 1: Write the proportion equation
   3,427.92 : 5,139.50 = 1,087.16 : x
2. Step 2: Convert to fraction form
   3,427.92/5,139.50 = 1,087.16/x
3. Step 3: Cross multiply
   3,427.92x = 5,139.50 × 1,087.16
4. Step 4: Simplify right side
   3,427.92x = 5,587,427.69
5. Step 5: Solve for x
   x = 5,587,427.69/3,427.92
6. Step 6: Final answer
   x = 1,629.98