Finding the Fourth Proportional to 1,833.31, 2,751.33 and 860.09

Step by Step Solution

1. Step 1: Write the proportion equation
   1,833.31 : 2,751.33 = 860.09 : x
2. Step 2: Convert to fraction form
   1,833.31/2,751.33 = 860.09/x
3. Step 3: Cross multiply
   1,833.31x = 2,751.33 × 860.09
4. Step 4: Simplify right side
   1,833.31x = 2,366,400.47
5. Step 5: Solve for x
   x = 2,366,400.47/1,833.31
6. Step 6: Final answer
   x = 1,290.78