Finding the Fourth Proportional to 2,120.12, 3,181.56 and 965.88

Step by Step Solution

1. Step 1: Write the proportion equation
   2,120.12 : 3,181.56 = 965.88 : x
2. Step 2: Convert to fraction form
   2,120.12/3,181.56 = 965.88/x
3. Step 3: Cross multiply
   2,120.12x = 3,181.56 × 965.88
4. Step 4: Simplify right side
   2,120.12x = 3,073,005.17
5. Step 5: Solve for x
   x = 3,073,005.17/2,120.12
6. Step 6: Final answer
   x = 1,449.45