Finding the Fourth Proportional to 1,566.35, 2,161.59 and 858.18

Step by Step Solution

1. Step 1: Write the proportion equation
   1,566.35 : 2,161.59 = 858.18 : x
2. Step 2: Convert to fraction form
   1,566.35/2,161.59 = 858.18/x
3. Step 3: Cross multiply
   1,566.35x = 2,161.59 × 858.18
4. Step 4: Simplify right side
   1,566.35x = 1,855,033.31
5. Step 5: Solve for x
   x = 1,855,033.31/1,566.35
6. Step 6: Final answer
   x = 1,184.30