Finding the Fourth Proportional to 1,015.47, 1,401.35 and 549.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,015.47 : 1,401.35 = 549.72 : x
2. Step 2: Convert to fraction form
   1,015.47/1,401.35 = 549.72/x
3. Step 3: Cross multiply
   1,015.47x = 1,401.35 × 549.72
4. Step 4: Simplify right side
   1,015.47x = 770,350.12
5. Step 5: Solve for x
   x = 770,350.12/1,015.47
6. Step 6: Final answer
   x = 758.61