Finding the Fourth Proportional to 1,568.86, 2,165.01 and 870.24

Step by Step Solution

1. Step 1: Write the proportion equation
   1,568.86 : 2,165.01 = 870.24 : x
2. Step 2: Convert to fraction form
   1,568.86/2,165.01 = 870.24/x
3. Step 3: Cross multiply
   1,568.86x = 2,165.01 × 870.24
4. Step 4: Simplify right side
   1,568.86x = 1,884,078.30
5. Step 5: Solve for x
   x = 1,884,078.30/1,568.86
6. Step 6: Final answer
   x = 1,200.92