Finding the Fourth Proportional to 12,155.13, 18,225.41 and 8,247.69

Step by Step Solution

1. Step 1: Write the proportion equation
   12,155.13 : 18,225.41 = 8,247.69 : x
2. Step 2: Convert to fraction form
   12,155.13/18,225.41 = 8,247.69/x
3. Step 3: Cross multiply
   12,155.13x = 18,225.41 × 8,247.69
4. Step 4: Simplify right side
   12,155.13x = 150,317,490.56
5. Step 5: Solve for x
   x = 150,317,490.56/12,155.13
6. Step 6: Final answer
   x = 12,366.59