Finding the Fourth Proportional to 12,087.37, 18,123.99 and 6,820.12

Step by Step Solution

1. Step 1: Write the proportion equation
   12,087.37 : 18,123.99 = 6,820.12 : x
2. Step 2: Convert to fraction form
   12,087.37/18,123.99 = 6,820.12/x
3. Step 3: Cross multiply
   12,087.37x = 18,123.99 × 6,820.12
4. Step 4: Simplify right side
   12,087.37x = 123,607,786.68
5. Step 5: Solve for x
   x = 123,607,786.68/12,087.37
6. Step 6: Final answer
   x = 10,226.19