Finding the Fourth Proportional to 2,662.92, 3,992.40 and 1,275.12

Step by Step Solution

1. Step 1: Write the proportion equation
   2,662.92 : 3,992.40 = 1,275.12 : x
2. Step 2: Convert to fraction form
   2,662.92/3,992.40 = 1,275.12/x
3. Step 3: Cross multiply
   2,662.92x = 3,992.40 × 1,275.12
4. Step 4: Simplify right side
   2,662.92x = 5,090,789.09
5. Step 5: Solve for x
   x = 5,090,789.09/2,662.92
6. Step 6: Final answer
   x = 1,911.73