Finding the Fourth Proportional to 2,186.19, 3,016.89 and 1,191.47

Step by Step Solution

1. Step 1: Write the proportion equation
   2,186.19 : 3,016.89 = 1,191.47 : x
2. Step 2: Convert to fraction form
   2,186.19/3,016.89 = 1,191.47/x
3. Step 3: Cross multiply
   2,186.19x = 3,016.89 × 1,191.47
4. Step 4: Simplify right side
   2,186.19x = 3,594,533.93
5. Step 5: Solve for x
   x = 3,594,533.93/2,186.19
6. Step 6: Final answer
   x = 1,644.20