Finding the Fourth Proportional to 1,361.82, 1,879.31 and 772.41

Step by Step Solution

1. Step 1: Write the proportion equation
   1,361.82 : 1,879.31 = 772.41 : x
2. Step 2: Convert to fraction form
   1,361.82/1,879.31 = 772.41/x
3. Step 3: Cross multiply
   1,361.82x = 1,879.31 × 772.41
4. Step 4: Simplify right side
   1,361.82x = 1,451,593.98
5. Step 5: Solve for x
   x = 1,451,593.98/1,361.82
6. Step 6: Final answer
   x = 1,065.92