Finding the Fourth Proportional to 5,158.62, 7,118.33 and 2,920.32

Step by Step Solution

1. Step 1: Write the proportion equation
   5,158.62 : 7,118.33 = 2,920.32 : x
2. Step 2: Convert to fraction form
   5,158.62/7,118.33 = 2,920.32/x
3. Step 3: Cross multiply
   5,158.62x = 7,118.33 × 2,920.32
4. Step 4: Simplify right side
   5,158.62x = 20,787,786.86
5. Step 5: Solve for x
   x = 20,787,786.86/5,158.62
6. Step 6: Final answer
   x = 4,029.72