Finding the Fourth Proportional to 12,228.24, 18,338.52 and 5,208.20

Step by Step Solution

1. Step 1: Write the proportion equation
   12,228.24 : 18,338.52 = 5,208.20 : x
2. Step 2: Convert to fraction form
   12,228.24/18,338.52 = 5,208.20/x
3. Step 3: Cross multiply
   12,228.24x = 18,338.52 × 5,208.20
4. Step 4: Simplify right side
   12,228.24x = 95,510,679.86
5. Step 5: Solve for x
   x = 95,510,679.86/12,228.24
6. Step 6: Final answer
   x = 7,810.66