Finding the Fourth Proportional to 1,510.36, 2,083.51 and 949.78

Step by Step Solution

1. Step 1: Write the proportion equation
   1,510.36 : 2,083.51 = 949.78 : x
2. Step 2: Convert to fraction form
   1,510.36/2,083.51 = 949.78/x
3. Step 3: Cross multiply
   1,510.36x = 2,083.51 × 949.78
4. Step 4: Simplify right side
   1,510.36x = 1,978,870.87
5. Step 5: Solve for x
   x = 1,978,870.87/1,510.36
6. Step 6: Final answer
   x = 1,310.20