Finding the Fourth Proportional to 5,105.72, 7,045.72 and 2,867.60

Step by Step Solution

1. Step 1: Write the proportion equation
   5,105.72 : 7,045.72 = 2,867.60 : x
2. Step 2: Convert to fraction form
   5,105.72/7,045.72 = 2,867.60/x
3. Step 3: Cross multiply
   5,105.72x = 7,045.72 × 2,867.60
4. Step 4: Simplify right side
   5,105.72x = 20,204,306.67
5. Step 5: Solve for x
   x = 20,204,306.67/5,105.72
6. Step 6: Final answer
   x = 3,957.19