Finding the Fourth Proportional to 1,568.82, 2,164.97 and 870.20

Step by Step Solution

1. Step 1: Write the proportion equation
   1,568.82 : 2,164.97 = 870.20 : x
2. Step 2: Convert to fraction form
   1,568.82/2,164.97 = 870.20/x
3. Step 3: Cross multiply
   1,568.82x = 2,164.97 × 870.20
4. Step 4: Simplify right side
   1,568.82x = 1,883,941.72
5. Step 5: Solve for x
   x = 1,883,941.72/1,568.82
6. Step 6: Final answer
   x = 1,200.87