Finding the Fourth Proportional to 1,456.16, 2,009.57 and 858.83

Step by Step Solution

1. Step 1: Write the proportion equation
   1,456.16 : 2,009.57 = 858.83 : x
2. Step 2: Convert to fraction form
   1,456.16/2,009.57 = 858.83/x
3. Step 3: Cross multiply
   1,456.16x = 2,009.57 × 858.83
4. Step 4: Simplify right side
   1,456.16x = 1,725,864.66
5. Step 5: Solve for x
   x = 1,725,864.66/1,456.16
6. Step 6: Final answer
   x = 1,185.22