Finding the Fourth Proportional to 1,016.05, 1,520.73 and 771.23

Step by Step Solution

1. Step 1: Write the proportion equation
   1,016.05 : 1,520.73 = 771.23 : x
2. Step 2: Convert to fraction form
   1,016.05/1,520.73 = 771.23/x
3. Step 3: Cross multiply
   1,016.05x = 1,520.73 × 771.23
4. Step 4: Simplify right side
   1,016.05x = 1,172,832.60
5. Step 5: Solve for x
   x = 1,172,832.60/1,016.05
6. Step 6: Final answer
   x = 1,154.31