Finding the Fourth Proportional to 2,112.68, 3,168.64 and 958.16

Step by Step Solution

1. Step 1: Write the proportion equation
   2,112.68 : 3,168.64 = 958.16 : x
2. Step 2: Convert to fraction form
   2,112.68/3,168.64 = 958.16/x
3. Step 3: Cross multiply
   2,112.68x = 3,168.64 × 958.16
4. Step 4: Simplify right side
   2,112.68x = 3,036,064.10
5. Step 5: Solve for x
   x = 3,036,064.10/2,112.68
6. Step 6: Final answer
   x = 1,437.07