Finding the Fourth Proportional to 2,057.39, 3,087.35 and 961.86

Step by Step Solution

1. Step 1: Write the proportion equation
   2,057.39 : 3,087.35 = 961.86 : x
2. Step 2: Convert to fraction form
   2,057.39/3,087.35 = 961.86/x
3. Step 3: Cross multiply
   2,057.39x = 3,087.35 × 961.86
4. Step 4: Simplify right side
   2,057.39x = 2,969,608.85
5. Step 5: Solve for x
   x = 2,969,608.85/2,057.39
6. Step 6: Final answer
   x = 1,443.39