Finding the Fourth Proportional to 2,642.41, 3,960.63 and 1,253.82

Step by Step Solution

1. Step 1: Write the proportion equation
   2,642.41 : 3,960.63 = 1,253.82 : x
2. Step 2: Convert to fraction form
   2,642.41/3,960.63 = 1,253.82/x
3. Step 3: Cross multiply
   2,642.41x = 3,960.63 × 1,253.82
4. Step 4: Simplify right side
   2,642.41x = 4,965,917.11
5. Step 5: Solve for x
   x = 4,965,917.11/2,642.41
6. Step 6: Final answer
   x = 1,879.31