Finding the Fourth Proportional to 1,949.57, 2,688.99 and 1,240.71

Step by Step Solution

1. Step 1: Write the proportion equation
   1,949.57 : 2,688.99 = 1,240.71 : x
2. Step 2: Convert to fraction form
   1,949.57/2,688.99 = 1,240.71/x
3. Step 3: Cross multiply
   1,949.57x = 2,688.99 × 1,240.71
4. Step 4: Simplify right side
   1,949.57x = 3,336,256.78
5. Step 5: Solve for x
   x = 3,336,256.78/1,949.57
6. Step 6: Final answer
   x = 1,711.28