Finding the Fourth Proportional to 1,667.14, 2,300.78 and 959.21

Step by Step Solution

1. Step 1: Write the proportion equation
   1,667.14 : 2,300.78 = 959.21 : x
2. Step 2: Convert to fraction form
   1,667.14/2,300.78 = 959.21/x
3. Step 3: Cross multiply
   1,667.14x = 2,300.78 × 959.21
4. Step 4: Simplify right side
   1,667.14x = 2,206,922.08
5. Step 5: Solve for x
   x = 2,206,922.08/1,667.14
6. Step 6: Final answer
   x = 1,323.78