Finding the Fourth Proportional to 1,016.53, 1,402.79 and 550.78

Step by Step Solution

1. Step 1: Write the proportion equation
   1,016.53 : 1,402.79 = 550.78 : x
2. Step 2: Convert to fraction form
   1,016.53/1,402.79 = 550.78/x
3. Step 3: Cross multiply
   1,016.53x = 1,402.79 × 550.78
4. Step 4: Simplify right side
   1,016.53x = 772,626.55
5. Step 5: Solve for x
   x = 772,626.55/1,016.53
6. Step 6: Final answer
   x = 760.06