Finding the Fourth Proportional to 3,615.89, 4,987.85 and 2,123.53

Step by Step Solution

1. Step 1: Write the proportion equation
   3,615.89 : 4,987.85 = 2,123.53 : x
2. Step 2: Convert to fraction form
   3,615.89/4,987.85 = 2,123.53/x
3. Step 3: Cross multiply
   3,615.89x = 4,987.85 × 2,123.53
4. Step 4: Simplify right side
   3,615.89x = 10,591,826.02
5. Step 5: Solve for x
   x = 10,591,826.02/3,615.89
6. Step 6: Final answer
   x = 2,929.25