Finding the Fourth Proportional to 1,568.22, 2,164.24 and 869.59

Step by Step Solution

1. Step 1: Write the proportion equation
   1,568.22 : 2,164.24 = 869.59 : x
2. Step 2: Convert to fraction form
   1,568.22/2,164.24 = 869.59/x
3. Step 3: Cross multiply
   1,568.22x = 2,164.24 × 869.59
4. Step 4: Simplify right side
   1,568.22x = 1,882,000.36
5. Step 5: Solve for x
   x = 1,882,000.36/1,568.22
6. Step 6: Final answer
   x = 1,200.09