Finding the Fourth Proportional to 2,185.38, 3,015.83 and 1,289.32

Step by Step Solution

1. Step 1: Write the proportion equation
   2,185.38 : 3,015.83 = 1,289.32 : x
2. Step 2: Convert to fraction form
   2,185.38/3,015.83 = 1,289.32/x
3. Step 3: Cross multiply
   2,185.38x = 3,015.83 × 1,289.32
4. Step 4: Simplify right side
   2,185.38x = 3,888,365.62
5. Step 5: Solve for x
   x = 3,888,365.62/2,185.38
6. Step 6: Final answer
   x = 1,779.26