Finding the Fourth Proportional to 3,989.89, 5,506.37 and 2,311.33

Step by Step Solution

1. Step 1: Write the proportion equation
   3,989.89 : 5,506.37 = 2,311.33 : x
2. Step 2: Convert to fraction form
   3,989.89/5,506.37 = 2,311.33/x
3. Step 3: Cross multiply
   3,989.89x = 5,506.37 × 2,311.33
4. Step 4: Simplify right side
   3,989.89x = 12,727,038.17
5. Step 5: Solve for x
   x = 12,727,038.17/3,989.89
6. Step 6: Final answer
   x = 3,189.82