Finding the Fourth Proportional to 2,185.90, 3,016.44 and 1,191.12

Step by Step Solution

1. Step 1: Write the proportion equation
   2,185.90 : 3,016.44 = 1,191.12 : x
2. Step 2: Convert to fraction form
   2,185.90/3,016.44 = 1,191.12/x
3. Step 3: Cross multiply
   2,185.90x = 3,016.44 × 1,191.12
4. Step 4: Simplify right side
   2,185.90x = 3,592,942.01
5. Step 5: Solve for x
   x = 3,592,942.01/2,185.90
6. Step 6: Final answer
   x = 1,643.69