Finding the Fourth Proportional to 2,618.69, 3,927.60 and 769.59

Step by Step Solution

1. Step 1: Write the proportion equation
   2,618.69 : 3,927.60 = 769.59 : x
2. Step 2: Convert to fraction form
   2,618.69/3,927.60 = 769.59/x
3. Step 3: Cross multiply
   2,618.69x = 3,927.60 × 769.59
4. Step 4: Simplify right side
   2,618.69x = 3,022,641.68
5. Step 5: Solve for x
   x = 3,022,641.68/2,618.69
6. Step 6: Final answer
   x = 1,154.26