Finding the Fourth Proportional to 2,186.53, 3,017.39 and 1,191.81

Step by Step Solution

1. Step 1: Write the proportion equation
   2,186.53 : 3,017.39 = 1,191.81 : x
2. Step 2: Convert to fraction form
   2,186.53/3,017.39 = 1,191.81/x
3. Step 3: Cross multiply
   2,186.53x = 3,017.39 × 1,191.81
4. Step 4: Simplify right side
   2,186.53x = 3,596,155.58
5. Step 5: Solve for x
   x = 3,596,155.58/2,186.53
6. Step 6: Final answer
   x = 1,644.69