Finding the Fourth Proportional to 1,336.78, 1,844.49 and 777.25

Step by Step Solution

1. Step 1: Write the proportion equation
   1,336.78 : 1,844.49 = 777.25 : x
2. Step 2: Convert to fraction form
   1,336.78/1,844.49 = 777.25/x
3. Step 3: Cross multiply
   1,336.78x = 1,844.49 × 777.25
4. Step 4: Simplify right side
   1,336.78x = 1,433,629.85
5. Step 5: Solve for x
   x = 1,433,629.85/1,336.78
6. Step 6: Final answer
   x = 1,072.45