Finding the Fourth Proportional to 12,136.37, 18,197.00 and 5,112.77

Step by Step Solution

1. Step 1: Write the proportion equation
   12,136.37 : 18,197.00 = 5,112.77 : x
2. Step 2: Convert to fraction form
   12,136.37/18,197.00 = 5,112.77/x
3. Step 3: Cross multiply
   12,136.37x = 18,197.00 × 5,112.77
4. Step 4: Simplify right side
   12,136.37x = 93,036,978.31
5. Step 5: Solve for x
   x = 93,036,978.31/12,136.37
6. Step 6: Final answer
   x = 7,665.97