Finding the Fourth Proportional to 3,873.89, 5,345.95 and 2,105.46

Step by Step Solution

1. Step 1: Write the proportion equation
   3,873.89 : 5,345.95 = 2,105.46 : x
2. Step 2: Convert to fraction form
   3,873.89/5,345.95 = 2,105.46/x
3. Step 3: Cross multiply
   3,873.89x = 5,345.95 × 2,105.46
4. Step 4: Simplify right side
   3,873.89x = 11,255,682.57
5. Step 5: Solve for x
   x = 11,255,682.57/3,873.89
6. Step 6: Final answer
   x = 2,905.52