Finding the Fourth Proportional to 1,362.11, 1,879.88 and 772.83

Step by Step Solution

1. Step 1: Write the proportion equation
   1,362.11 : 1,879.88 = 772.83 : x
2. Step 2: Convert to fraction form
   1,362.11/1,879.88 = 772.83/x
3. Step 3: Cross multiply
   1,362.11x = 1,879.88 × 772.83
4. Step 4: Simplify right side
   1,362.11x = 1,452,823.80
5. Step 5: Solve for x
   x = 1,452,823.80/1,362.11
6. Step 6: Final answer
   x = 1,066.60