Finding the Fourth Proportional to 1,422.35, 1,960.57 and 949.31

Step by Step Solution

1. Step 1: Write the proportion equation
   1,422.35 : 1,960.57 = 949.31 : x
2. Step 2: Convert to fraction form
   1,422.35/1,960.57 = 949.31/x
3. Step 3: Cross multiply
   1,422.35x = 1,960.57 × 949.31
4. Step 4: Simplify right side
   1,422.35x = 1,861,188.71
5. Step 5: Solve for x
   x = 1,861,188.71/1,422.35
6. Step 6: Final answer
   x = 1,308.53