Finding the Fourth Proportional to 1,339.94, 1,849.08 and 780.44

Step by Step Solution

1. Step 1: Write the proportion equation
   1,339.94 : 1,849.08 = 780.44 : x
2. Step 2: Convert to fraction form
   1,339.94/1,849.08 = 780.44/x
3. Step 3: Cross multiply
   1,339.94x = 1,849.08 × 780.44
4. Step 4: Simplify right side
   1,339.94x = 1,443,086.75
5. Step 5: Solve for x
   x = 1,443,086.75/1,339.94
6. Step 6: Final answer
   x = 1,076.98