Finding the Fourth Proportional to 12,103.12, 18,145.73 and 5,085.21

Step by Step Solution

1. Step 1: Write the proportion equation
   12,103.12 : 18,145.73 = 5,085.21 : x
2. Step 2: Convert to fraction form
   12,103.12/18,145.73 = 5,085.21/x
3. Step 3: Cross multiply
   12,103.12x = 18,145.73 × 5,085.21
4. Step 4: Simplify right side
   12,103.12x = 92,274,860.37
5. Step 5: Solve for x
   x = 92,274,860.37/12,103.12
6. Step 6: Final answer
   x = 7,624.06