Finding the Fourth Proportional to 2,186.49, 3,017.30 and 1,191.71

Step by Step Solution

1. Step 1: Write the proportion equation
   2,186.49 : 3,017.30 = 1,191.71 : x
2. Step 2: Convert to fraction form
   2,186.49/3,017.30 = 1,191.71/x
3. Step 3: Cross multiply
   2,186.49x = 3,017.30 × 1,191.71
4. Step 4: Simplify right side
   2,186.49x = 3,595,754.87
5. Step 5: Solve for x
   x = 3,595,754.87/2,186.49
6. Step 6: Final answer
   x = 1,644.53