Finding the Fourth Proportional to 1,442.52, 1,990.67 and 779.37

Step by Step Solution

1. Step 1: Write the proportion equation
   1,442.52 : 1,990.67 = 779.37 : x
2. Step 2: Convert to fraction form
   1,442.52/1,990.67 = 779.37/x
3. Step 3: Cross multiply
   1,442.52x = 1,990.67 × 779.37
4. Step 4: Simplify right side
   1,442.52x = 1,551,465.45
5. Step 5: Solve for x
   x = 1,551,465.45/1,442.52
6. Step 6: Final answer
   x = 1,075.53