Finding the Fourth Proportional to 1,315.62, 1,968.78 and 968.16

Step by Step Solution

1. Step 1: Write the proportion equation
   1,315.62 : 1,968.78 = 968.16 : x
2. Step 2: Convert to fraction form
   1,315.62/1,968.78 = 968.16/x
3. Step 3: Cross multiply
   1,315.62x = 1,968.78 × 968.16
4. Step 4: Simplify right side
   1,315.62x = 1,906,094.04
5. Step 5: Solve for x
   x = 1,906,094.04/1,315.62
6. Step 6: Final answer
   x = 1,448.82