Finding the Fourth Proportional to 1,015.40, 1,512.42 and 968

Step by Step Solution

1. Step 1: Write the proportion equation
   1,015.40 : 1,512.42 = 968 : x
2. Step 2: Convert to fraction form
   1,015.40/1,512.42 = 968/x
3. Step 3: Cross multiply
   1,015.40x = 1,512.42 × 968
4. Step 4: Simplify right side
   1,015.40x = 1,464,022.56
5. Step 5: Solve for x
   x = 1,464,022.56/1,015.40
6. Step 6: Final answer
   x = 1,441.82