Finding the Fourth Proportional to 2,660.97, 3,989.74 and 1,274.27

Step by Step Solution

1. Step 1: Write the proportion equation
   2,660.97 : 3,989.74 = 1,274.27 : x
2. Step 2: Convert to fraction form
   2,660.97/3,989.74 = 1,274.27/x
3. Step 3: Cross multiply
   2,660.97x = 3,989.74 × 1,274.27
4. Step 4: Simplify right side
   2,660.97x = 5,084,012.78
5. Step 5: Solve for x
   x = 5,084,012.78/2,660.97
6. Step 6: Final answer
   x = 1,910.59