Finding the Fourth Proportional to 3,720.54, 5,134.43 and 2,105.32

Step by Step Solution

1. Step 1: Write the proportion equation
   3,720.54 : 5,134.43 = 2,105.32 : x
2. Step 2: Convert to fraction form
   3,720.54/5,134.43 = 2,105.32/x
3. Step 3: Cross multiply
   3,720.54x = 5,134.43 × 2,105.32
4. Step 4: Simplify right side
   3,720.54x = 10,809,618.17
5. Step 5: Solve for x
   x = 10,809,618.17/3,720.54
6. Step 6: Final answer
   x = 2,905.39