Finding the Fourth Proportional to 1,568.65, 2,164.71 and 870.01

Step by Step Solution

1. Step 1: Write the proportion equation
   1,568.65 : 2,164.71 = 870.01 : x
2. Step 2: Convert to fraction form
   1,568.65/2,164.71 = 870.01/x
3. Step 3: Cross multiply
   1,568.65x = 2,164.71 × 870.01
4. Step 4: Simplify right side
   1,568.65x = 1,883,319.35
5. Step 5: Solve for x
   x = 1,883,319.35/1,568.65
6. Step 6: Final answer
   x = 1,200.60