Finding the Fourth Proportional to 3,873.50, 5,345.46 and 2,105.12

Step by Step Solution

1. Step 1: Write the proportion equation
   3,873.50 : 5,345.46 = 2,105.12 : x
2. Step 2: Convert to fraction form
   3,873.50/5,345.46 = 2,105.12/x
3. Step 3: Cross multiply
   3,873.50x = 5,345.46 × 2,105.12
4. Step 4: Simplify right side
   3,873.50x = 11,252,834.76
5. Step 5: Solve for x
   x = 11,252,834.76/3,873.50
6. Step 6: Final answer
   x = 2,905.08