Finding the Fourth Proportional to 1,568.41, 2,164.63 and 905.49

Step by Step Solution

1. Step 1: Write the proportion equation
   1,568.41 : 2,164.63 = 905.49 : x
2. Step 2: Convert to fraction form
   1,568.41/2,164.63 = 905.49/x
3. Step 3: Cross multiply
   1,568.41x = 2,164.63 × 905.49
4. Step 4: Simplify right side
   1,568.41x = 1,960,050.82
5. Step 5: Solve for x
   x = 1,960,050.82/1,568.41
6. Step 6: Final answer
   x = 1,249.71