Finding the Fourth Proportional to 21,635.80, 29,855.59 and 12,074.83

Step by Step Solution

1. Step 1: Write the proportion equation
   21,635.80 : 29,855.59 = 12,074.83 : x
2. Step 2: Convert to fraction form
   21,635.80/29,855.59 = 12,074.83/x
3. Step 3: Cross multiply
   21,635.80x = 29,855.59 × 12,074.83
4. Step 4: Simplify right side
   21,635.80x = 360,501,173.80
5. Step 5: Solve for x
   x = 360,501,173.80/21,635.80
6. Step 6: Final answer
   x = 16,662.25