Finding the Fourth Proportional to 12,022.89, 18,021.33 and 4,118.10

Step by Step Solution

1. Step 1: Write the proportion equation
   12,022.89 : 18,021.33 = 4,118.10 : x
2. Step 2: Convert to fraction form
   12,022.89/18,021.33 = 4,118.10/x
3. Step 3: Cross multiply
   12,022.89x = 18,021.33 × 4,118.10
4. Step 4: Simplify right side
   12,022.89x = 74,213,639.07
5. Step 5: Solve for x
   x = 74,213,639.07/12,022.89
6. Step 6: Final answer
   x = 6,172.70