Finding the Fourth Proportional to 1,435.98, 1,981.50 and 963.78

Step by Step Solution

1. Step 1: Write the proportion equation
   1,435.98 : 1,981.50 = 963.78 : x
2. Step 2: Convert to fraction form
   1,435.98/1,981.50 = 963.78/x
3. Step 3: Cross multiply
   1,435.98x = 1,981.50 × 963.78
4. Step 4: Simplify right side
   1,435.98x = 1,909,715.34
5. Step 5: Solve for x
   x = 1,909,715.34/1,435.98
6. Step 6: Final answer
   x = 1,329.91