Finding the Fourth Proportional to 1,489.72, 2,054.55 and 958.69

Step by Step Solution

1. Step 1: Write the proportion equation
   1,489.72 : 2,054.55 = 958.69 : x
2. Step 2: Convert to fraction form
   1,489.72/2,054.55 = 958.69/x
3. Step 3: Cross multiply
   1,489.72x = 2,054.55 × 958.69
4. Step 4: Simplify right side
   1,489.72x = 1,969,676.54
5. Step 5: Solve for x
   x = 1,969,676.54/1,489.72
6. Step 6: Final answer
   x = 1,322.18