Finding the Fourth Proportional to 1,015.49, 1,401.37 and 549.74

Step by Step Solution

1. Step 1: Write the proportion equation
   1,015.49 : 1,401.37 = 549.74 : x
2. Step 2: Convert to fraction form
   1,015.49/1,401.37 = 549.74/x
3. Step 3: Cross multiply
   1,015.49x = 1,401.37 × 549.74
4. Step 4: Simplify right side
   1,015.49x = 770,384.27
5. Step 5: Solve for x
   x = 770,384.27/1,015.49
6. Step 6: Final answer
   x = 758.63