Finding the Fourth Proportional to 2,661.97, 3,991.24 and 1,275.27

Step by Step Solution

1. Step 1: Write the proportion equation
   2,661.97 : 3,991.24 = 1,275.27 : x
2. Step 2: Convert to fraction form
   2,661.97/3,991.24 = 1,275.27/x
3. Step 3: Cross multiply
   2,661.97x = 3,991.24 × 1,275.27
4. Step 4: Simplify right side
   2,661.97x = 5,089,908.63
5. Step 5: Solve for x
   x = 5,089,908.63/2,661.97
6. Step 6: Final answer
   x = 1,912.08