Finding the Fourth Proportional to 2,636.79, 3,960.31 and 1,940.71

Step by Step Solution

1. Step 1: Write the proportion equation
   2,636.79 : 3,960.31 = 1,940.71 : x
2. Step 2: Convert to fraction form
   2,636.79/3,960.31 = 1,940.71/x
3. Step 3: Cross multiply
   2,636.79x = 3,960.31 × 1,940.71
4. Step 4: Simplify right side
   2,636.79x = 7,685,798.47
5. Step 5: Solve for x
   x = 7,685,798.47/2,636.79
6. Step 6: Final answer
   x = 2,914.83