Finding the Fourth Proportional to 1,362.10, 1,879.60 and 772.73

Step by Step Solution

1. Step 1: Write the proportion equation
   1,362.10 : 1,879.60 = 772.73 : x
2. Step 2: Convert to fraction form
   1,362.10/1,879.60 = 772.73/x
3. Step 3: Cross multiply
   1,362.10x = 1,879.60 × 772.73
4. Step 4: Simplify right side
   1,362.10x = 1,452,411.98
5. Step 5: Solve for x
   x = 1,452,411.98/1,362.10
6. Step 6: Final answer
   x = 1,066.31