Finding the Fourth Proportional to 1,431.48, 1,974.34 and 959.23

Step by Step Solution

1. Step 1: Write the proportion equation
   1,431.48 : 1,974.34 = 959.23 : x
2. Step 2: Convert to fraction form
   1,431.48/1,974.34 = 959.23/x
3. Step 3: Cross multiply
   1,431.48x = 1,974.34 × 959.23
4. Step 4: Simplify right side
   1,431.48x = 1,893,841.22
5. Step 5: Solve for x
   x = 1,893,841.22/1,431.48
6. Step 6: Final answer
   x = 1,322.99