Finding the Fourth Proportional to 18,788.22, 25,858.71 and 16,105.50

Step by Step Solution

1. Step 1: Write the proportion equation
   18,788.22 : 25,858.71 = 16,105.50 : x
2. Step 2: Convert to fraction form
   18,788.22/25,858.71 = 16,105.50/x
3. Step 3: Cross multiply
   18,788.22x = 25,858.71 × 16,105.50
4. Step 4: Simplify right side
   18,788.22x = 416,467,453.91
5. Step 5: Solve for x
   x = 416,467,453.91/18,788.22
6. Step 6: Final answer
   x = 22,166.41