Finding the Fourth Proportional to 1,339.18, 1,848.50 and 779.54

Step by Step Solution

1. Step 1: Write the proportion equation
   1,339.18 : 1,848.50 = 779.54 : x
2. Step 2: Convert to fraction form
   1,339.18/1,848.50 = 779.54/x
3. Step 3: Cross multiply
   1,339.18x = 1,848.50 × 779.54
4. Step 4: Simplify right side
   1,339.18x = 1,440,971.17
5. Step 5: Solve for x
   x = 1,440,971.17/1,339.18
6. Step 6: Final answer
   x = 1,076.01