Finding the Fourth Proportional to 1,706.78, 2,355.21 and 960.59

Step by Step Solution

1. Step 1: Write the proportion equation
   1,706.78 : 2,355.21 = 960.59 : x
2. Step 2: Convert to fraction form
   1,706.78/2,355.21 = 960.59/x
3. Step 3: Cross multiply
   1,706.78x = 2,355.21 × 960.59
4. Step 4: Simplify right side
   1,706.78x = 2,262,379.40
5. Step 5: Solve for x
   x = 2,262,379.40/1,706.78
6. Step 6: Final answer
   x = 1,325.53