Finding the Fourth Proportional to 12,136.83, 18,199.57 and 8,462.67

Step by Step Solution

1. Step 1: Write the proportion equation
   12,136.83 : 18,199.57 = 8,462.67 : x
2. Step 2: Convert to fraction form
   12,136.83/18,199.57 = 8,462.67/x
3. Step 3: Cross multiply
   12,136.83x = 18,199.57 × 8,462.67
4. Step 4: Simplify right side
   12,136.83x = 154,016,955.05
5. Step 5: Solve for x
   x = 154,016,955.05/12,136.83
6. Step 6: Final answer
   x = 12,690.05