Finding the Fourth Proportional to 1,222.38, 1,685.03 and 959.94

Step by Step Solution

1. Step 1: Write the proportion equation
   1,222.38 : 1,685.03 = 959.94 : x
2. Step 2: Convert to fraction form
   1,222.38/1,685.03 = 959.94/x
3. Step 3: Cross multiply
   1,222.38x = 1,685.03 × 959.94
4. Step 4: Simplify right side
   1,222.38x = 1,617,522.90
5. Step 5: Solve for x
   x = 1,617,522.90/1,222.38
6. Step 6: Final answer
   x = 1,323.26