Finding the Fourth Proportional to 3,996.72, 5,516.18 and 2,505.92

Step by Step Solution

1. Step 1: Write the proportion equation
   3,996.72 : 5,516.18 = 2,505.92 : x
2. Step 2: Convert to fraction form
   3,996.72/5,516.18 = 2,505.92/x
3. Step 3: Cross multiply
   3,996.72x = 5,516.18 × 2,505.92
4. Step 4: Simplify right side
   3,996.72x = 13,823,065.68
5. Step 5: Solve for x
   x = 13,823,065.68/3,996.72
6. Step 6: Final answer
   x = 3,458.60