Finding the Fourth Proportional to 3,108.10, 4,667.55 and 2,190.10

Step by Step Solution

1. Step 1: Write the proportion equation
   3,108.10 : 4,667.55 = 2,190.10 : x
2. Step 2: Convert to fraction form
   3,108.10/4,667.55 = 2,190.10/x
3. Step 3: Cross multiply
   3,108.10x = 4,667.55 × 2,190.10
4. Step 4: Simplify right side
   3,108.10x = 10,222,401.26
5. Step 5: Solve for x
   x = 10,222,401.26/3,108.10
6. Step 6: Final answer
   x = 3,288.96