Finding the Fourth Proportional to 3,442.10, 5,165.57 and 2,663.89

Step by Step Solution

1. Step 1: Write the proportion equation
   3,442.10 : 5,165.57 = 2,663.89 : x
2. Step 2: Convert to fraction form
   3,442.10/5,165.57 = 2,663.89/x
3. Step 3: Cross multiply
   3,442.10x = 5,165.57 × 2,663.89
4. Step 4: Simplify right side
   3,442.10x = 13,760,504.01
5. Step 5: Solve for x
   x = 13,760,504.01/3,442.10
6. Step 6: Final answer
   x = 3,997.71