Finding the Fourth Proportional to 12,224.16, 18,339.92 and 5,111.85

Step by Step Solution

1. Step 1: Write the proportion equation
   12,224.16 : 18,339.92 = 5,111.85 : x
2. Step 2: Convert to fraction form
   12,224.16/18,339.92 = 5,111.85/x
3. Step 3: Cross multiply
   12,224.16x = 18,339.92 × 5,111.85
4. Step 4: Simplify right side
   12,224.16x = 93,750,932.83
5. Step 5: Solve for x
   x = 93,750,932.83/12,224.16
6. Step 6: Final answer
   x = 7,669.32