Finding the Fourth Proportional to 3,131.28, 4,696.94 and 1,185.68

Step by Step Solution

1. Step 1: Write the proportion equation
   3,131.28 : 4,696.94 = 1,185.68 : x
2. Step 2: Convert to fraction form
   3,131.28/4,696.94 = 1,185.68/x
3. Step 3: Cross multiply
   3,131.28x = 4,696.94 × 1,185.68
4. Step 4: Simplify right side
   3,131.28x = 5,569,067.82
5. Step 5: Solve for x
   x = 5,569,067.82/3,131.28
6. Step 6: Final answer
   x = 1,778.53