Finding the Fourth Proportional to 12,342.10, 18,513 and 3,108.10

Step by Step Solution

1. Step 1: Write the proportion equation
   12,342.10 : 18,513 = 3,108.10 : x
2. Step 2: Convert to fraction form
   12,342.10/18,513 = 3,108.10/x
3. Step 3: Cross multiply
   12,342.10x = 18,513 × 3,108.10
4. Step 4: Simplify right side
   12,342.10x = 57,540,255.30
5. Step 5: Solve for x
   x = 57,540,255.30/12,342.10
6. Step 6: Final answer
   x = 4,662.11