Finding the Fourth Proportional to 2,662.72, 3,991.37 and 1,274.02

Step by Step Solution

1. Step 1: Write the proportion equation
   2,662.72 : 3,991.37 = 1,274.02 : x
2. Step 2: Convert to fraction form
   2,662.72/3,991.37 = 1,274.02/x
3. Step 3: Cross multiply
   2,662.72x = 3,991.37 × 1,274.02
4. Step 4: Simplify right side
   2,662.72x = 5,085,085.21
5. Step 5: Solve for x
   x = 5,085,085.21/2,662.72
6. Step 6: Final answer
   x = 1,909.73