Finding the Fourth Proportional to 12,111.59, 18,171 and 3,792.49

Step by Step Solution

1. Step 1: Write the proportion equation
   12,111.59 : 18,171 = 3,792.49 : x
2. Step 2: Convert to fraction form
   12,111.59/18,171 = 3,792.49/x
3. Step 3: Cross multiply
   12,111.59x = 18,171 × 3,792.49
4. Step 4: Simplify right side
   12,111.59x = 68,913,290.36
5. Step 5: Solve for x
   x = 68,913,290.36/12,111.59
6. Step 6: Final answer
   x = 5,689.86