Finding the Fourth Proportional to 1,362.90, 1,880.82 and 773.31

Step by Step Solution

1. Step 1: Write the proportion equation
   1,362.90 : 1,880.82 = 773.31 : x
2. Step 2: Convert to fraction form
   1,362.90/1,880.82 = 773.31/x
3. Step 3: Cross multiply
   1,362.90x = 1,880.82 × 773.31
4. Step 4: Simplify right side
   1,362.90x = 1,454,453.05
5. Step 5: Solve for x
   x = 1,454,453.05/1,362.90
6. Step 6: Final answer
   x = 1,067.18