Finding the Fourth Proportional to 5,105.39, 7,662.27 and 2,640.96

Step by Step Solution

1. Step 1: Write the proportion equation
   5,105.39 : 7,662.27 = 2,640.96 : x
2. Step 2: Convert to fraction form
   5,105.39/7,662.27 = 2,640.96/x
3. Step 3: Cross multiply
   5,105.39x = 7,662.27 × 2,640.96
4. Step 4: Simplify right side
   5,105.39x = 20,235,748.58
5. Step 5: Solve for x
   x = 20,235,748.58/5,105.39
6. Step 6: Final answer
   x = 3,963.61