Finding the Fourth Proportional to 3,654.72, 5,042.66 and 2,162.90

Step by Step Solution

1. Step 1: Write the proportion equation
   3,654.72 : 5,042.66 = 2,162.90 : x
2. Step 2: Convert to fraction form
   3,654.72/5,042.66 = 2,162.90/x
3. Step 3: Cross multiply
   3,654.72x = 5,042.66 × 2,162.90
4. Step 4: Simplify right side
   3,654.72x = 10,906,771.11
5. Step 5: Solve for x
   x = 10,906,771.11/3,654.72
6. Step 6: Final answer
   x = 2,984.30