Finding the Fourth Proportional to 2,186.76, 3,017.60 and 1,191.96

Step by Step Solution

1. Step 1: Write the proportion equation
   2,186.76 : 3,017.60 = 1,191.96 : x
2. Step 2: Convert to fraction form
   2,186.76/3,017.60 = 1,191.96/x
3. Step 3: Cross multiply
   2,186.76x = 3,017.60 × 1,191.96
4. Step 4: Simplify right side
   2,186.76x = 3,596,858.50
5. Step 5: Solve for x
   x = 3,596,858.50/2,186.76
6. Step 6: Final answer
   x = 1,644.83