Finding the Fourth Proportional to 1,568.51, 2,164.49 and 905.73

Step by Step Solution

1. Step 1: Write the proportion equation
   1,568.51 : 2,164.49 = 905.73 : x
2. Step 2: Convert to fraction form
   1,568.51/2,164.49 = 905.73/x
3. Step 3: Cross multiply
   1,568.51x = 2,164.49 × 905.73
4. Step 4: Simplify right side
   1,568.51x = 1,960,443.53
5. Step 5: Solve for x
   x = 1,960,443.53/1,568.51
6. Step 6: Final answer
   x = 1,249.88