Finding the Fourth Proportional to 2,185.92, 3,016.49 and 1,191.21

Step by Step Solution

1. Step 1: Write the proportion equation
   2,185.92 : 3,016.49 = 1,191.21 : x
2. Step 2: Convert to fraction form
   2,185.92/3,016.49 = 1,191.21/x
3. Step 3: Cross multiply
   2,185.92x = 3,016.49 × 1,191.21
4. Step 4: Simplify right side
   2,185.92x = 3,593,255.79
5. Step 5: Solve for x
   x = 3,593,255.79/2,185.92
6. Step 6: Final answer
   x = 1,643.82