Finding the Fourth Proportional to 2,185.63, 3,016.52 and 1,289.39

Step by Step Solution

1. Step 1: Write the proportion equation
   2,185.63 : 3,016.52 = 1,289.39 : x
2. Step 2: Convert to fraction form
   2,185.63/3,016.52 = 1,289.39/x
3. Step 3: Cross multiply
   2,185.63x = 3,016.52 × 1,289.39
4. Step 4: Simplify right side
   2,185.63x = 3,889,474.47
5. Step 5: Solve for x
   x = 3,889,474.47/2,185.63
6. Step 6: Final answer
   x = 1,779.56