Finding the Fourth Proportional to 1,406.72, 1,940.72 and 963.86

Step by Step Solution

1. Step 1: Write the proportion equation
   1,406.72 : 1,940.72 = 963.86 : x
2. Step 2: Convert to fraction form
   1,406.72/1,940.72 = 963.86/x
3. Step 3: Cross multiply
   1,406.72x = 1,940.72 × 963.86
4. Step 4: Simplify right side
   1,406.72x = 1,870,582.38
5. Step 5: Solve for x
   x = 1,870,582.38/1,406.72
6. Step 6: Final answer
   x = 1,329.75