Finding the Fourth Proportional to 2,920.15, 4,022.75 and 2,499.15

Step by Step Solution

1. Step 1: Write the proportion equation
   2,920.15 : 4,022.75 = 2,499.15 : x
2. Step 2: Convert to fraction form
   2,920.15/4,022.75 = 2,499.15/x
3. Step 3: Cross multiply
   2,920.15x = 4,022.75 × 2,499.15
4. Step 4: Simplify right side
   2,920.15x = 10,053,443.17
5. Step 5: Solve for x
   x = 10,053,443.17/2,920.15
6. Step 6: Final answer
   x = 3,442.79