Finding the Fourth Proportional to 1,339.49, 1,848.30 and 779.82

Step by Step Solution

1. Step 1: Write the proportion equation
   1,339.49 : 1,848.30 = 779.82 : x
2. Step 2: Convert to fraction form
   1,339.49/1,848.30 = 779.82/x
3. Step 3: Cross multiply
   1,339.49x = 1,848.30 × 779.82
4. Step 4: Simplify right side
   1,339.49x = 1,441,341.31
5. Step 5: Solve for x
   x = 1,441,341.31/1,339.49
6. Step 6: Final answer
   x = 1,076.04