Finding the Fourth Proportional to 2,806.56, 3,874.32 and 2,661.12

Step by Step Solution

1. Step 1: Write the proportion equation
   2,806.56 : 3,874.32 = 2,661.12 : x
2. Step 2: Convert to fraction form
   2,806.56/3,874.32 = 2,661.12/x
3. Step 3: Cross multiply
   2,806.56x = 3,874.32 × 2,661.12
4. Step 4: Simplify right side
   2,806.56x = 10,310,030.44
5. Step 5: Solve for x
   x = 10,310,030.44/2,806.56
6. Step 6: Final answer
   x = 3,673.55