Finding the Fourth Proportional to 2,650.76, 3,976.20 and 919.38

Step by Step Solution

1. Step 1: Write the proportion equation
   2,650.76 : 3,976.20 = 919.38 : x
2. Step 2: Convert to fraction form
   2,650.76/3,976.20 = 919.38/x
3. Step 3: Cross multiply
   2,650.76x = 3,976.20 × 919.38
4. Step 4: Simplify right side
   2,650.76x = 3,655,638.76
5. Step 5: Solve for x
   x = 3,655,638.76/2,650.76
6. Step 6: Final answer
   x = 1,379.09