Finding the Fourth Proportional to 2,116.94, 3,173.78 and 961.88

Step by Step Solution

1. Step 1: Write the proportion equation
   2,116.94 : 3,173.78 = 961.88 : x
2. Step 2: Convert to fraction form
   2,116.94/3,173.78 = 961.88/x
3. Step 3: Cross multiply
   2,116.94x = 3,173.78 × 961.88
4. Step 4: Simplify right side
   2,116.94x = 3,052,782.04
5. Step 5: Solve for x
   x = 3,052,782.04/2,116.94
6. Step 6: Final answer
   x = 1,442.08