Finding the Fourth Proportional to 23,915.50, 33,003.69 and 13,161.61

Step by Step Solution

1. Step 1: Write the proportion equation
   23,915.50 : 33,003.69 = 13,161.61 : x
2. Step 2: Convert to fraction form
   23,915.50/33,003.69 = 13,161.61/x
3. Step 3: Cross multiply
   23,915.50x = 33,003.69 × 13,161.61
4. Step 4: Simplify right side
   23,915.50x = 434,381,696.34
5. Step 5: Solve for x
   x = 434,381,696.34/23,915.50
6. Step 6: Final answer
   x = 18,163.19