Finding the Fourth Proportional to 2,185.61, 3,016.15 and 1,190.89

Step by Step Solution

1. Step 1: Write the proportion equation
   2,185.61 : 3,016.15 = 1,190.89 : x
2. Step 2: Convert to fraction form
   2,185.61/3,016.15 = 1,190.89/x
3. Step 3: Cross multiply
   2,185.61x = 3,016.15 × 1,190.89
4. Step 4: Simplify right side
   2,185.61x = 3,591,903.67
5. Step 5: Solve for x
   x = 3,591,903.67/2,185.61
6. Step 6: Final answer
   x = 1,643.43