Finding the Fourth Proportional to 1,019.86, 1,396.86 and 960.02

Step by Step Solution

1. Step 1: Write the proportion equation
   1,019.86 : 1,396.86 = 960.02 : x
2. Step 2: Convert to fraction form
   1,019.86/1,396.86 = 960.02/x
3. Step 3: Cross multiply
   1,019.86x = 1,396.86 × 960.02
4. Step 4: Simplify right side
   1,019.86x = 1,341,006.55
5. Step 5: Solve for x
   x = 1,341,006.55/1,019.86
6. Step 6: Final answer
   x = 1,314.90