Finding the Fourth Proportional to 1,423.76, 1,964.04 and 958.16

Step by Step Solution

1. Step 1: Write the proportion equation
   1,423.76 : 1,964.04 = 958.16 : x
2. Step 2: Convert to fraction form
   1,423.76/1,964.04 = 958.16/x
3. Step 3: Cross multiply
   1,423.76x = 1,964.04 × 958.16
4. Step 4: Simplify right side
   1,423.76x = 1,881,864.57
5. Step 5: Solve for x
   x = 1,881,864.57/1,423.76
6. Step 6: Final answer
   x = 1,321.76