Finding the Fourth Proportional to 1,209.15, 1,667.82 and 960.07

Step by Step Solution

1. Step 1: Write the proportion equation
   1,209.15 : 1,667.82 = 960.07 : x
2. Step 2: Convert to fraction form
   1,209.15/1,667.82 = 960.07/x
3. Step 3: Cross multiply
   1,209.15x = 1,667.82 × 960.07
4. Step 4: Simplify right side
   1,209.15x = 1,601,223.95
5. Step 5: Solve for x
   x = 1,601,223.95/1,209.15
6. Step 6: Final answer
   x = 1,324.26