Finding the Fourth Proportional to 3,654.79, 5,042.86 and 2,161.55

Step by Step Solution

1. Step 1: Write the proportion equation
   3,654.79 : 5,042.86 = 2,161.55 : x
2. Step 2: Convert to fraction form
   3,654.79/5,042.86 = 2,161.55/x
3. Step 3: Cross multiply
   3,654.79x = 5,042.86 × 2,161.55
4. Step 4: Simplify right side
   3,654.79x = 10,900,401.24
5. Step 5: Solve for x
   x = 10,900,401.24/3,654.79
6. Step 6: Final answer
   x = 2,982.50