Finding the Fourth Proportional to 1,182.96, 1,772.52 and 858.54

Step by Step Solution

1. Step 1: Write the proportion equation
   1,182.96 : 1,772.52 = 858.54 : x
2. Step 2: Convert to fraction form
   1,182.96/1,772.52 = 858.54/x
3. Step 3: Cross multiply
   1,182.96x = 1,772.52 × 858.54
4. Step 4: Simplify right side
   1,182.96x = 1,521,779.32
5. Step 5: Solve for x
   x = 1,521,779.32/1,182.96
6. Step 6: Final answer
   x = 1,286.42