Finding the Fourth Proportional to 2,186.58, 3,017.46 and 1,191.86

Step by Step Solution

1. Step 1: Write the proportion equation
   2,186.58 : 3,017.46 = 1,191.86 : x
2. Step 2: Convert to fraction form
   2,186.58/3,017.46 = 1,191.86/x
3. Step 3: Cross multiply
   2,186.58x = 3,017.46 × 1,191.86
4. Step 4: Simplify right side
   2,186.58x = 3,596,371.81
5. Step 5: Solve for x
   x = 3,596,371.81/2,186.58
6. Step 6: Final answer
   x = 1,644.75