Finding the Fourth Proportional to 1,337.78, 1,845.87 and 778.25

Step by Step Solution

1. Step 1: Write the proportion equation
   1,337.78 : 1,845.87 = 778.25 : x
2. Step 2: Convert to fraction form
   1,337.78/1,845.87 = 778.25/x
3. Step 3: Cross multiply
   1,337.78x = 1,845.87 × 778.25
4. Step 4: Simplify right side
   1,337.78x = 1,436,548.33
5. Step 5: Solve for x
   x = 1,436,548.33/1,337.78
6. Step 6: Final answer
   x = 1,073.83