Finding the Fourth Proportional to 1,339.17, 1,848.09 and 779.83

Step by Step Solution

1. Step 1: Write the proportion equation
   1,339.17 : 1,848.09 = 779.83 : x
2. Step 2: Convert to fraction form
   1,339.17/1,848.09 = 779.83/x
3. Step 3: Cross multiply
   1,339.17x = 1,848.09 × 779.83
4. Step 4: Simplify right side
   1,339.17x = 1,441,196.02
5. Step 5: Solve for x
   x = 1,441,196.02/1,339.17
6. Step 6: Final answer
   x = 1,076.19