Finding the Fourth Proportional to 1,362.33, 1,879.63 and 772.85

Step by Step Solution

1. Step 1: Write the proportion equation
   1,362.33 : 1,879.63 = 772.85 : x
2. Step 2: Convert to fraction form
   1,362.33/1,879.63 = 772.85/x
3. Step 3: Cross multiply
   1,362.33x = 1,879.63 × 772.85
4. Step 4: Simplify right side
   1,362.33x = 1,452,674.81
5. Step 5: Solve for x
   x = 1,452,674.81/1,362.33
6. Step 6: Final answer
   x = 1,066.32