Finding the Fourth Proportional to 1,568.88, 2,165.00 and 870.30

Step by Step Solution

1. Step 1: Write the proportion equation
   1,568.88 : 2,165.00 = 870.30 : x
2. Step 2: Convert to fraction form
   1,568.88/2,165.00 = 870.30/x
3. Step 3: Cross multiply
   1,568.88x = 2,165.00 × 870.30
4. Step 4: Simplify right side
   1,568.88x = 1,884,195.15
5. Step 5: Solve for x
   x = 1,884,195.15/1,568.88
6. Step 6: Final answer
   x = 1,200.98