Finding the Fourth Proportional to 2,056.61, 3,086.73 and 961.58

Step by Step Solution

1. Step 1: Write the proportion equation
   2,056.61 : 3,086.73 = 961.58 : x
2. Step 2: Convert to fraction form
   2,056.61/3,086.73 = 961.58/x
3. Step 3: Cross multiply
   2,056.61x = 3,086.73 × 961.58
4. Step 4: Simplify right side
   2,056.61x = 2,968,122.40
5. Step 5: Solve for x
   x = 2,968,122.40/2,056.61
6. Step 6: Final answer
   x = 1,443.21