Finding the Fourth Proportional to 2,422.10, 3,640.35 and 2,105.30

Step by Step Solution

1. Step 1: Write the proportion equation
   2,422.10 : 3,640.35 = 2,105.30 : x
2. Step 2: Convert to fraction form
   2,422.10/3,640.35 = 2,105.30/x
3. Step 3: Cross multiply
   2,422.10x = 3,640.35 × 2,105.30
4. Step 4: Simplify right side
   2,422.10x = 7,664,028.86
5. Step 5: Solve for x
   x = 7,664,028.86/2,422.10
6. Step 6: Final answer
   x = 3,164.21