Finding the Fourth Proportional to 5,105.60, 7,045.18 and 2,867.72

Step by Step Solution

1. Step 1: Write the proportion equation
   5,105.60 : 7,045.18 = 2,867.72 : x
2. Step 2: Convert to fraction form
   5,105.60/7,045.18 = 2,867.72/x
3. Step 3: Cross multiply
   5,105.60x = 7,045.18 × 2,867.72
4. Step 4: Simplify right side
   5,105.60x = 20,203,600.82
5. Step 5: Solve for x
   x = 20,203,600.82/5,105.60
6. Step 6: Final answer
   x = 3,957.15