Finding the Fourth Proportional to 1,015.63, 1,401.56 and 549.88

Step by Step Solution

1. Step 1: Write the proportion equation
   1,015.63 : 1,401.56 = 549.88 : x
2. Step 2: Convert to fraction form
   1,015.63/1,401.56 = 549.88/x
3. Step 3: Cross multiply
   1,015.63x = 1,401.56 × 549.88
4. Step 4: Simplify right side
   1,015.63x = 770,689.81
5. Step 5: Solve for x
   x = 770,689.81/1,015.63
6. Step 6: Final answer
   x = 758.83