Finding the Fourth Proportional to 2,920.72, 4,380.81 and 1,165.26

Step by Step Solution

1. Step 1: Write the proportion equation
   2,920.72 : 4,380.81 = 1,165.26 : x
2. Step 2: Convert to fraction form
   2,920.72/4,380.81 = 1,165.26/x
3. Step 3: Cross multiply
   2,920.72x = 4,380.81 × 1,165.26
4. Step 4: Simplify right side
   2,920.72x = 5,104,785.68
5. Step 5: Solve for x
   x = 5,104,785.68/2,920.72
6. Step 6: Final answer
   x = 1,747.78