Finding the Fourth Proportional to 1,765.69, 2,436.78 and 979.90

Step by Step Solution

1. Step 1: Write the proportion equation
   1,765.69 : 2,436.78 = 979.90 : x
2. Step 2: Convert to fraction form
   1,765.69/2,436.78 = 979.90/x
3. Step 3: Cross multiply
   1,765.69x = 2,436.78 × 979.90
4. Step 4: Simplify right side
   1,765.69x = 2,387,800.72
5. Step 5: Solve for x
   x = 2,387,800.72/1,765.69
6. Step 6: Final answer
   x = 1,352.33