Finding the Fourth Proportional to 1,440.79, 1,986.93 and 968.15

Step by Step Solution

1. Step 1: Write the proportion equation
   1,440.79 : 1,986.93 = 968.15 : x
2. Step 2: Convert to fraction form
   1,440.79/1,986.93 = 968.15/x
3. Step 3: Cross multiply
   1,440.79x = 1,986.93 × 968.15
4. Step 4: Simplify right side
   1,440.79x = 1,923,651.25
5. Step 5: Solve for x
   x = 1,923,651.25/1,440.79
6. Step 6: Final answer
   x = 1,335.14