Finding the Fourth Proportional to 5,109.89, 7,662.83 and 1,989.48

Step by Step Solution

1. Step 1: Write the proportion equation
   5,109.89 : 7,662.83 = 1,989.48 : x
2. Step 2: Convert to fraction form
   5,109.89/7,662.83 = 1,989.48/x
3. Step 3: Cross multiply
   5,109.89x = 7,662.83 × 1,989.48
4. Step 4: Simplify right side
   5,109.89x = 15,245,037.08
5. Step 5: Solve for x
   x = 15,245,037.08/5,109.89
6. Step 6: Final answer
   x = 2,983.44