Finding the Fourth Proportional to 2,185.83, 3,016.84 and 1,289.51

Step by Step Solution

1. Step 1: Write the proportion equation
   2,185.83 : 3,016.84 = 1,289.51 : x
2. Step 2: Convert to fraction form
   2,185.83/3,016.84 = 1,289.51/x
3. Step 3: Cross multiply
   2,185.83x = 3,016.84 × 1,289.51
4. Step 4: Simplify right side
   2,185.83x = 3,890,249.67
5. Step 5: Solve for x
   x = 3,890,249.67/2,185.83
6. Step 6: Final answer
   x = 1,779.76