Finding the Fourth Proportional to 12,081, 18,123.12 and 5,157.12

Step by Step Solution

1. Step 1: Write the proportion equation
   12,081 : 18,123.12 = 5,157.12 : x
2. Step 2: Convert to fraction form
   12,081/18,123.12 = 5,157.12/x
3. Step 3: Cross multiply
   12,081x = 18,123.12 × 5,157.12
4. Step 4: Simplify right side
   12,081x = 93,463,104.61
5. Step 5: Solve for x
   x = 93,463,104.61/12,081
6. Step 6: Final answer
   x = 7,736.37