Finding the Fourth Proportional to 1,405.56, 1,940.04 and 963.30

Step by Step Solution

1. Step 1: Write the proportion equation
   1,405.56 : 1,940.04 = 963.30 : x
2. Step 2: Convert to fraction form
   1,405.56/1,940.04 = 963.30/x
3. Step 3: Cross multiply
   1,405.56x = 1,940.04 × 963.30
4. Step 4: Simplify right side
   1,405.56x = 1,868,840.53
5. Step 5: Solve for x
   x = 1,868,840.53/1,405.56
6. Step 6: Final answer
   x = 1,329.61