Finding the Fourth Proportional to 5,105.80, 7,659.22 and 1,408.03

Step by Step Solution

1. Step 1: Write the proportion equation
   5,105.80 : 7,659.22 = 1,408.03 : x
2. Step 2: Convert to fraction form
   5,105.80/7,659.22 = 1,408.03/x
3. Step 3: Cross multiply
   5,105.80x = 7,659.22 × 1,408.03
4. Step 4: Simplify right side
   5,105.80x = 10,784,411.54
5. Step 5: Solve for x
   x = 10,784,411.54/5,105.80
6. Step 6: Final answer
   x = 2,112.19