Finding the Fourth Proportional to 3,615.89, 4,989.96 and 2,123.82

Step by Step Solution

1. Step 1: Write the proportion equation
   3,615.89 : 4,989.96 = 2,123.82 : x
2. Step 2: Convert to fraction form
   3,615.89/4,989.96 = 2,123.82/x
3. Step 3: Cross multiply
   3,615.89x = 4,989.96 × 2,123.82
4. Step 4: Simplify right side
   3,615.89x = 10,597,776.85
5. Step 5: Solve for x
   x = 10,597,776.85/3,615.89
6. Step 6: Final answer
   x = 2,930.89