Finding the Fourth Proportional to 1,406.30, 1,939.73 and 964.23

Step by Step Solution

1. Step 1: Write the proportion equation
   1,406.30 : 1,939.73 = 964.23 : x
2. Step 2: Convert to fraction form
   1,406.30/1,939.73 = 964.23/x
3. Step 3: Cross multiply
   1,406.30x = 1,939.73 × 964.23
4. Step 4: Simplify right side
   1,406.30x = 1,870,341.04
5. Step 5: Solve for x
   x = 1,870,341.04/1,406.30
6. Step 6: Final answer
   x = 1,329.98