Finding the Fourth Proportional to 1,568.81, 2,164.25 and 1,009.17

Step by Step Solution

1. Step 1: Write the proportion equation
   1,568.81 : 2,164.25 = 1,009.17 : x
2. Step 2: Convert to fraction form
   1,568.81/2,164.25 = 1,009.17/x
3. Step 3: Cross multiply
   1,568.81x = 2,164.25 × 1,009.17
4. Step 4: Simplify right side
   1,568.81x = 2,184,096.17
5. Step 5: Solve for x
   x = 2,184,096.17/1,568.81
6. Step 6: Final answer
   x = 1,392.20