Finding the Fourth Proportional to 3,996.99, 5,516.57 and 2,506.20

Step by Step Solution

1. Step 1: Write the proportion equation
   3,996.99 : 5,516.57 = 2,506.20 : x
2. Step 2: Convert to fraction form
   3,996.99/5,516.57 = 2,506.20/x
3. Step 3: Cross multiply
   3,996.99x = 5,516.57 × 2,506.20
4. Step 4: Simplify right side
   3,996.99x = 13,825,627.73
5. Step 5: Solve for x
   x = 13,825,627.73/3,996.99
6. Step 6: Final answer
   x = 3,459.01