Finding the Fourth Proportional to 1,568.72, 2,165.28 and 1,256.16

Step by Step Solution

1. Step 1: Write the proportion equation
   1,568.72 : 2,165.28 = 1,256.16 : x
2. Step 2: Convert to fraction form
   1,568.72/2,165.28 = 1,256.16/x
3. Step 3: Cross multiply
   1,568.72x = 2,165.28 × 1,256.16
4. Step 4: Simplify right side
   1,568.72x = 2,719,936.42
5. Step 5: Solve for x
   x = 2,719,936.42/1,568.72
6. Step 6: Final answer
   x = 1,733.86