Finding the Fourth Proportional to 1,015.62, 1,401.56 and 549.87

Step by Step Solution

1. Step 1: Write the proportion equation
   1,015.62 : 1,401.56 = 549.87 : x
2. Step 2: Convert to fraction form
   1,015.62/1,401.56 = 549.87/x
3. Step 3: Cross multiply
   1,015.62x = 1,401.56 × 549.87
4. Step 4: Simplify right side
   1,015.62x = 770,673.05
5. Step 5: Solve for x
   x = 770,673.05/1,015.62
6. Step 6: Final answer
   x = 758.82