Finding the Fourth Proportional to 1,567.06, 2,162.56 and 858.89

Step by Step Solution

1. Step 1: Write the proportion equation
   1,567.06 : 2,162.56 = 858.89 : x
2. Step 2: Convert to fraction form
   1,567.06/2,162.56 = 858.89/x
3. Step 3: Cross multiply
   1,567.06x = 2,162.56 × 858.89
4. Step 4: Simplify right side
   1,567.06x = 1,857,386.05
5. Step 5: Solve for x
   x = 1,857,386.05/1,567.06
6. Step 6: Final answer
   x = 1,185.27