Finding the Fourth Proportional to 28,764.50, 43,162.25 and 12,136.05

Step by Step Solution

1. Step 1: Write the proportion equation
   28,764.50 : 43,162.25 = 12,136.05 : x
2. Step 2: Convert to fraction form
   28,764.50/43,162.25 = 12,136.05/x
3. Step 3: Cross multiply
   28,764.50x = 43,162.25 × 12,136.05
4. Step 4: Simplify right side
   28,764.50x = 523,819,163.43
5. Step 5: Solve for x
   x = 523,819,163.43/28,764.50
6. Step 6: Final answer
   x = 18,210.62