Finding the Fourth Proportional to 2,185.48, 3,016.72 and 1,289.19

Step by Step Solution

1. Step 1: Write the proportion equation
   2,185.48 : 3,016.72 = 1,289.19 : x
2. Step 2: Convert to fraction form
   2,185.48/3,016.72 = 1,289.19/x
3. Step 3: Cross multiply
   2,185.48x = 3,016.72 × 1,289.19
4. Step 4: Simplify right side
   2,185.48x = 3,889,125.26
5. Step 5: Solve for x
   x = 3,889,125.26/2,185.48
6. Step 6: Final answer
   x = 1,779.53