Finding the Fourth Proportional to 1,367.91, 1,887.82 and 778.48

Step by Step Solution

1. Step 1: Write the proportion equation
   1,367.91 : 1,887.82 = 778.48 : x
2. Step 2: Convert to fraction form
   1,367.91/1,887.82 = 778.48/x
3. Step 3: Cross multiply
   1,367.91x = 1,887.82 × 778.48
4. Step 4: Simplify right side
   1,367.91x = 1,469,626.22
5. Step 5: Solve for x
   x = 1,469,626.22/1,367.91
6. Step 6: Final answer
   x = 1,074.36