Finding the Fourth Proportional to 2,186.24, 3,280.92 and 1,091.12

Step by Step Solution

1. Step 1: Write the proportion equation
   2,186.24 : 3,280.92 = 1,091.12 : x
2. Step 2: Convert to fraction form
   2,186.24/3,280.92 = 1,091.12/x
3. Step 3: Cross multiply
   2,186.24x = 3,280.92 × 1,091.12
4. Step 4: Simplify right side
   2,186.24x = 3,579,877.43
5. Step 5: Solve for x
   x = 3,579,877.43/2,186.24
6. Step 6: Final answer
   x = 1,637.46