Finding the Fourth Proportional to 2,105.20, 2,951.60 and 2,105.20

Step by Step Solution

1. Step 1: Write the proportion equation
   2,105.20 : 2,951.60 = 2,105.20 : x
2. Step 2: Convert to fraction form
   2,105.20/2,951.60 = 2,105.20/x
3. Step 3: Cross multiply
   2,105.20x = 2,951.60 × 2,105.20
4. Step 4: Simplify right side
   2,105.20x = 6,213,708.32
5. Step 5: Solve for x
   x = 6,213,708.32/2,105.20
6. Step 6: Final answer
   x = 2,951.60