Finding the Fourth Proportional to 3,933.82, 5,429.20 and 2,540.62

Step by Step Solution

1. Step 1: Write the proportion equation
   3,933.82 : 5,429.20 = 2,540.62 : x
2. Step 2: Convert to fraction form
   3,933.82/5,429.20 = 2,540.62/x
3. Step 3: Cross multiply
   3,933.82x = 5,429.20 × 2,540.62
4. Step 4: Simplify right side
   3,933.82x = 13,793,534.10
5. Step 5: Solve for x
   x = 13,793,534.10/3,933.82
6. Step 6: Final answer
   x = 3,506.40