Finding the Fourth Proportional to 1,431.09, 1,974.69 and 958.23

Step by Step Solution

1. Step 1: Write the proportion equation
   1,431.09 : 1,974.69 = 958.23 : x
2. Step 2: Convert to fraction form
   1,431.09/1,974.69 = 958.23/x
3. Step 3: Cross multiply
   1,431.09x = 1,974.69 × 958.23
4. Step 4: Simplify right side
   1,431.09x = 1,892,207.20
5. Step 5: Solve for x
   x = 1,892,207.20/1,431.09
6. Step 6: Final answer
   x = 1,322.21