Finding the Fourth Proportional to 2,662.80, 3,992.25 and 1,274.94

Step by Step Solution

1. Step 1: Write the proportion equation
   2,662.80 : 3,992.25 = 1,274.94 : x
2. Step 2: Convert to fraction form
   2,662.80/3,992.25 = 1,274.94/x
3. Step 3: Cross multiply
   2,662.80x = 3,992.25 × 1,274.94
4. Step 4: Simplify right side
   2,662.80x = 5,089,879.22
5. Step 5: Solve for x
   x = 5,089,879.22/2,662.80
6. Step 6: Final answer
   x = 1,911.48