Finding the Fourth Proportional to 2,619.06, 3,927.61 and 769.69

Step by Step Solution

1. Step 1: Write the proportion equation
   2,619.06 : 3,927.61 = 769.69 : x
2. Step 2: Convert to fraction form
   2,619.06/3,927.61 = 769.69/x
3. Step 3: Cross multiply
   2,619.06x = 3,927.61 × 769.69
4. Step 4: Simplify right side
   2,619.06x = 3,023,042.14
5. Step 5: Solve for x
   x = 3,023,042.14/2,619.06
6. Step 6: Final answer
   x = 1,154.25