Finding the Fourth Proportional to 12,141.98, 18,208.55 and 4,242.27

Step by Step Solution

1. Step 1: Write the proportion equation
   12,141.98 : 18,208.55 = 4,242.27 : x
2. Step 2: Convert to fraction form
   12,141.98/18,208.55 = 4,242.27/x
3. Step 3: Cross multiply
   12,141.98x = 18,208.55 × 4,242.27
4. Step 4: Simplify right side
   12,141.98x = 77,245,564.20
5. Step 5: Solve for x
   x = 77,245,564.20/12,141.98
6. Step 6: Final answer
   x = 6,361.86