Finding the Fourth Proportional to 1,435.42, 1,978.88 and 963.40

Step by Step Solution

1. Step 1: Write the proportion equation
   1,435.42 : 1,978.88 = 963.40 : x
2. Step 2: Convert to fraction form
   1,435.42/1,978.88 = 963.40/x
3. Step 3: Cross multiply
   1,435.42x = 1,978.88 × 963.40
4. Step 4: Simplify right side
   1,435.42x = 1,906,452.99
5. Step 5: Solve for x
   x = 1,906,452.99/1,435.42
6. Step 6: Final answer
   x = 1,328.15