Finding the Fourth Proportional to 1,568.84, 2,164.86 and 870.08

Step by Step Solution

1. Step 1: Write the proportion equation
   1,568.84 : 2,164.86 = 870.08 : x
2. Step 2: Convert to fraction form
   1,568.84/2,164.86 = 870.08/x
3. Step 3: Cross multiply
   1,568.84x = 2,164.86 × 870.08
4. Step 4: Simplify right side
   1,568.84x = 1,883,601.39
5. Step 5: Solve for x
   x = 1,883,601.39/1,568.84
6. Step 6: Final answer
   x = 1,200.63