Finding the Fourth Proportional to 1,568.52, 2,164.55 and 905.58

Step by Step Solution

1. Step 1: Write the proportion equation
   1,568.52 : 2,164.55 = 905.58 : x
2. Step 2: Convert to fraction form
   1,568.52/2,164.55 = 905.58/x
3. Step 3: Cross multiply
   1,568.52x = 2,164.55 × 905.58
4. Step 4: Simplify right side
   1,568.52x = 1,960,168.66
5. Step 5: Solve for x
   x = 1,960,168.66/1,568.52
6. Step 6: Final answer
   x = 1,249.69