Finding the Fourth Proportional to 12,171.92, 18,151.08 and 12,061.08

Step by Step Solution

1. Step 1: Write the proportion equation
   12,171.92 : 18,151.08 = 12,061.08 : x
2. Step 2: Convert to fraction form
   12,171.92/18,151.08 = 12,061.08/x
3. Step 3: Cross multiply
   12,171.92x = 18,151.08 × 12,061.08
4. Step 4: Simplify right side
   12,171.92x = 218,921,627.97
5. Step 5: Solve for x
   x = 218,921,627.97/12,171.92
6. Step 6: Final answer
   x = 17,985.79