Finding the Fourth Proportional to 1,568.81, 2,162.61 and 1,009.10

Step by Step Solution

1. Step 1: Write the proportion equation
   1,568.81 : 2,162.61 = 1,009.10 : x
2. Step 2: Convert to fraction form
   1,568.81/2,162.61 = 1,009.10/x
3. Step 3: Cross multiply
   1,568.81x = 2,162.61 × 1,009.10
4. Step 4: Simplify right side
   1,568.81x = 2,182,278.94
5. Step 5: Solve for x
   x = 2,182,278.94/1,568.81
6. Step 6: Final answer
   x = 1,391.05