Finding the Fourth Proportional to 2,661.05, 3,991.32 and 1,255.14

Step by Step Solution

1. Step 1: Write the proportion equation
   2,661.05 : 3,991.32 = 1,255.14 : x
2. Step 2: Convert to fraction form
   2,661.05/3,991.32 = 1,255.14/x
3. Step 3: Cross multiply
   2,661.05x = 3,991.32 × 1,255.14
4. Step 4: Simplify right side
   2,661.05x = 5,009,659.11
5. Step 5: Solve for x
   x = 5,009,659.11/2,661.05
6. Step 6: Final answer
   x = 1,882.59