Finding the Fourth Proportional to 1,362.27, 1,879.73 and 772.69

Step by Step Solution

1. Step 1: Write the proportion equation
   1,362.27 : 1,879.73 = 772.69 : x
2. Step 2: Convert to fraction form
   1,362.27/1,879.73 = 772.69/x
3. Step 3: Cross multiply
   1,362.27x = 1,879.73 × 772.69
4. Step 4: Simplify right side
   1,362.27x = 1,452,445.81
5. Step 5: Solve for x
   x = 1,452,445.81/1,362.27
6. Step 6: Final answer
   x = 1,066.20