Finding the Fourth Proportional to 1,329.67, 1,835.49 and 956.80

Step by Step Solution

1. Step 1: Write the proportion equation
   1,329.67 : 1,835.49 = 956.80 : x
2. Step 2: Convert to fraction form
   1,329.67/1,835.49 = 956.80/x
3. Step 3: Cross multiply
   1,329.67x = 1,835.49 × 956.80
4. Step 4: Simplify right side
   1,329.67x = 1,756,196.83
5. Step 5: Solve for x
   x = 1,756,196.83/1,329.67
6. Step 6: Final answer
   x = 1,320.78