Finding the Fourth Proportional to 2,186.39, 3,017.25 and 1,191.68

Step by Step Solution

1. Step 1: Write the proportion equation
   2,186.39 : 3,017.25 = 1,191.68 : x
2. Step 2: Convert to fraction form
   2,186.39/3,017.25 = 1,191.68/x
3. Step 3: Cross multiply
   2,186.39x = 3,017.25 × 1,191.68
4. Step 4: Simplify right side
   2,186.39x = 3,595,592.71
5. Step 5: Solve for x
   x = 3,595,592.71/2,186.39
6. Step 6: Final answer
   x = 1,644.53