Finding the Fourth Proportional to 2,185.96, 3,016.56 and 1,191.23

Step by Step Solution

1. Step 1: Write the proportion equation
   2,185.96 : 3,016.56 = 1,191.23 : x
2. Step 2: Convert to fraction form
   2,185.96/3,016.56 = 1,191.23/x
3. Step 3: Cross multiply
   2,185.96x = 3,016.56 × 1,191.23
4. Step 4: Simplify right side
   2,185.96x = 3,593,416.77
5. Step 5: Solve for x
   x = 3,593,416.77/2,185.96
6. Step 6: Final answer
   x = 1,643.86