Finding the Fourth Proportional to 1,015.57, 1,401.47 and 549.82

Step by Step Solution

1. Step 1: Write the proportion equation
   1,015.57 : 1,401.47 = 549.82 : x
2. Step 2: Convert to fraction form
   1,015.57/1,401.47 = 549.82/x
3. Step 3: Cross multiply
   1,015.57x = 1,401.47 × 549.82
4. Step 4: Simplify right side
   1,015.57x = 770,556.24
5. Step 5: Solve for x
   x = 770,556.24/1,015.57
6. Step 6: Final answer
   x = 758.74