Finding the Fourth Proportional to 3,405.72, 5,101.38 and 2,574.84

Step by Step Solution

1. Step 1: Write the proportion equation
   3,405.72 : 5,101.38 = 2,574.84 : x
2. Step 2: Convert to fraction form
   3,405.72/5,101.38 = 2,574.84/x
3. Step 3: Cross multiply
   3,405.72x = 5,101.38 × 2,574.84
4. Step 4: Simplify right side
   3,405.72x = 13,135,237.28
5. Step 5: Solve for x
   x = 13,135,237.28/3,405.72
6. Step 6: Final answer
   x = 3,856.82