Finding the Fourth Proportional to 2,186.48, 3,017.34 and 1,191.76

Step by Step Solution

1. Step 1: Write the proportion equation
   2,186.48 : 3,017.34 = 1,191.76 : x
2. Step 2: Convert to fraction form
   2,186.48/3,017.34 = 1,191.76/x
3. Step 3: Cross multiply
   2,186.48x = 3,017.34 × 1,191.76
4. Step 4: Simplify right side
   2,186.48x = 3,595,945.12
5. Step 5: Solve for x
   x = 3,595,945.12/2,186.48
6. Step 6: Final answer
   x = 1,644.63