Finding the Fourth Proportional to 3,784.11, 5,222.01 and 2,105.31

Step by Step Solution

1. Step 1: Write the proportion equation
   3,784.11 : 5,222.01 = 2,105.31 : x
2. Step 2: Convert to fraction form
   3,784.11/5,222.01 = 2,105.31/x
3. Step 3: Cross multiply
   3,784.11x = 5,222.01 × 2,105.31
4. Step 4: Simplify right side
   3,784.11x = 10,993,949.87
5. Step 5: Solve for x
   x = 10,993,949.87/3,784.11
6. Step 6: Final answer
   x = 2,905.29