Finding the Fourth Proportional to 1,361.94, 1,879.50 and 772.49

Step by Step Solution

1. Step 1: Write the proportion equation
   1,361.94 : 1,879.50 = 772.49 : x
2. Step 2: Convert to fraction form
   1,361.94/1,879.50 = 772.49/x
3. Step 3: Cross multiply
   1,361.94x = 1,879.50 × 772.49
4. Step 4: Simplify right side
   1,361.94x = 1,451,894.96
5. Step 5: Solve for x
   x = 1,451,894.96/1,361.94
6. Step 6: Final answer
   x = 1,066.05