Finding the Fourth Proportional to 2,650.68, 3,976.38 and 919.08

Step by Step Solution

1. Step 1: Write the proportion equation
   2,650.68 : 3,976.38 = 919.08 : x
2. Step 2: Convert to fraction form
   2,650.68/3,976.38 = 919.08/x
3. Step 3: Cross multiply
   2,650.68x = 3,976.38 × 919.08
4. Step 4: Simplify right side
   2,650.68x = 3,654,611.33
5. Step 5: Solve for x
   x = 3,654,611.33/2,650.68
6. Step 6: Final answer
   x = 1,378.74