Finding the Fourth Proportional to 1,130.25, 1,559.43 and 687.83

Step by Step Solution

1. Step 1: Write the proportion equation
   1,130.25 : 1,559.43 = 687.83 : x
2. Step 2: Convert to fraction form
   1,130.25/1,559.43 = 687.83/x
3. Step 3: Cross multiply
   1,130.25x = 1,559.43 × 687.83
4. Step 4: Simplify right side
   1,130.25x = 1,072,626.16
5. Step 5: Solve for x
   x = 1,072,626.16/1,130.25
6. Step 6: Final answer
   x = 949.02