Finding the Fourth Proportional to 1,205.89, 1,662.52 and 958.03

Step by Step Solution

1. Step 1: Write the proportion equation
   1,205.89 : 1,662.52 = 958.03 : x
2. Step 2: Convert to fraction form
   1,205.89/1,662.52 = 958.03/x
3. Step 3: Cross multiply
   1,205.89x = 1,662.52 × 958.03
4. Step 4: Simplify right side
   1,205.89x = 1,592,744.04
5. Step 5: Solve for x
   x = 1,592,744.04/1,205.89
6. Step 6: Final answer
   x = 1,320.80