Finding the Fourth Proportional to 1,568.09, 2,164.03 and 869.46

Step by Step Solution

1. Step 1: Write the proportion equation
   1,568.09 : 2,164.03 = 869.46 : x
2. Step 2: Convert to fraction form
   1,568.09/2,164.03 = 869.46/x
3. Step 3: Cross multiply
   1,568.09x = 2,164.03 × 869.46
4. Step 4: Simplify right side
   1,568.09x = 1,881,537.52
5. Step 5: Solve for x
   x = 1,881,537.52/1,568.09
6. Step 6: Final answer
   x = 1,199.89