Finding the Fourth Proportional to 2,186.29, 3,017.09 and 1,191.55

Step by Step Solution

1. Step 1: Write the proportion equation
   2,186.29 : 3,017.09 = 1,191.55 : x
2. Step 2: Convert to fraction form
   2,186.29/3,017.09 = 1,191.55/x
3. Step 3: Cross multiply
   2,186.29x = 3,017.09 × 1,191.55
4. Step 4: Simplify right side
   2,186.29x = 3,595,013.59
5. Step 5: Solve for x
   x = 3,595,013.59/2,186.29
6. Step 6: Final answer
   x = 1,644.34