Finding the Fourth Proportional to 1,423.29, 1,964.37 and 885.18

Step by Step Solution

1. Step 1: Write the proportion equation
   1,423.29 : 1,964.37 = 885.18 : x
2. Step 2: Convert to fraction form
   1,423.29/1,964.37 = 885.18/x
3. Step 3: Cross multiply
   1,423.29x = 1,964.37 × 885.18
4. Step 4: Simplify right side
   1,423.29x = 1,738,821.04
5. Step 5: Solve for x
   x = 1,738,821.04/1,423.29
6. Step 6: Final answer
   x = 1,221.69